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±ÀÂ˧A̤@Ó¤£¿ùªººô¯¸---¼Æ¦ìµø³¥ ¦UºØ¼Æ¦ì¬Û¾÷ªºµû¤ñ»Pºô¤Íªº¤¬°Ê°Q½×,¥i¥H°µ¬°ÁʶR«eªº°Ñ¦Ò. ÁÙ´£¨Ñ¤F³\¦h¨R¬~¼Æ¦ì·Ó¤ùªºªù¥«¤Îºô¯¸,¥Ø«e4x6¤@±i¥un6¤¸! §ó¯S§Oªº¬O,ÁÙ¦³°O¾Ð¥dªº¥X¯²,§Ú¹L¦~¥X°ê´N¥´ºâ¦V¥L̯²°O¾Ð¥d,´N¤£¥Î§âNotebook¦ª¥X¥h! www.dcview.com.tw = Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at http://jse.stat.ncsu.edu/ =
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I, too, prefer closed-book tests in statistical methods courses. I also like short-answer items, some of which may be multiple-choice items. [Please don't gripe that all multiple-choice items assessonly memory recall; such items, if constructed well, may be very helpful in assessing learning!] I think that a very important aspect of evaluation of student performance and knowledge pertains to variability; variability in the sense of class performance. If assessment of student learning does not reflect some variability in student performance, there is a very serious problem with the assessment process used! Of course, variability may be expected to decrease as we get into more advanced courses. For whatever it is worth. Carl Huberty
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unsubscribe edstat-l Jineshwar Singh Business Department George Brown College St .James campus [EMAIL PROTECTED] * You cannot control how others act but you can control how you react. 416 -415-2089 http://www.gbrownc.on.ca/~jsingh = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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Rich Ulrich [EMAIL PROTECTED] wrote in sci.stat.edu: Just a reminder, folks - The Usenet group sci.stat.edu is linked to a mailing list. I posted to the newsgroup and got a bounce message about my mail to someone at Stanford. I don't know enough about mailing-list software to suggest details, but surely it is possible to configure it so that this does not happen? Bounce messages should go to the owner of the mailing list, not to someone who is not even a member. -- Stan Brown, Oak Road Systems, Cortland County, New York, USA http://oakroadsystems.com My reply address is correct as is. The courtesy of providing a correct reply address is more important to me than time spent deleting spam. = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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unsubscribe -- Charles Blaich Daniel F. Evans Associate Professor of Social Science Special Assistant to the Dean for Strategic Initiatives Wabash College Crawfordsville, IN 47933 = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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Just a reminder, folks - The Usenet group sci.stat.edu is linked to a mailing list. If you really want to Unsubscribe from the mailing list, do NOT post your request to the group's address for Questions. Please heed the message which is listed AT THE BOTTOM OF EVERY MAIL-LIST MESSAGE - and read those instructions which tell you a different address. On 1 Oct 2001 07:47:01 -0700, [EMAIL PROTECTED] (Charles Blaich) wrote: - his message unsubscribe [ ... snip, tag ] = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ = -- end message -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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subscribe edstat-l Jan Winchell = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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subscribe edsta José Aguinaldo Fonseca, UFMG
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Why do articles appear in print when study methods, analyses, results, and conclusions are somewhat faulty? [This may be considered as a follow-up to an earlier edstat interchange.] My first, and perhaps overly critical, response is that the editorial practices are faulty. I don't find Dennis Roberts' "reasons" in his 27 Apr message too satisfying. I regularly have students write critiques of articles in their respective areas of study. And I discover many, many, ... errors in reporting. I often ask myself, WHY? I can think of two reasons: 1) journal editors can not or do not send manuscripts to reviewers with statistical analysis expertise; and 2) manuscript originators do not regularly seek methodologists as co-authors. Which is more prevalent? For whatever it is worth ... Carl Huberty
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subscribe ,edstat-livan balducci, unesp = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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Title: Welcome to Adobe GoLive 4 Under the Bill s. 1618 title III passed by the 105th US congress this letter cannot be considered SPAM as long as the sender includes contact information and a method of removal. To be removed, hit reply and type ?remove? in the subject line. Welcome to my newsletter!! You will find many interesting and valuable links in this monthly newsletter. Everything is FREE. Majority of the sites, pay you money to join their Free membership. What you will find? * Affiliate Programs for webmasters and website owners * Banner advertising * Fun Stuff * Personals (We have the best ever) * e-cards * Free Webmaster resources * Free website promotion * Free website web hosting * Free website SUBMIT LET US START! *** Affiliate Programs *** Half.com. Great deals on Videos, CDs, DVDs, Computers and many other stuff. ShareSale Drive traffic to your online store using performance based marketing. PlugInGo One of the best Network Affiliates and pay big $$$ ExitFuel http://www.cj.com Plug into the Commission Junction global network and maximize your affiliate marketing. With hundreds of thousands of affiliates and over a thousand merchants, our revenue sharing relationships produce results - not promises. Merchants maximize their reach, brand and sales, all on a performance basis. Affiliates turn their content into commerce and their Web sites into powerful revenue generators. For more information please visit WOW Lots of money is generated from this site every month just for refferals Linkshare Another Network affiliates ReadClick Get Paid to read emails Ewanted Best of the Web SendMoreInfo Get Paid to read emails MintMail Get Paid to read emails InboxDollars Get Paid to read emails PaysU Get paid $0.50 per hour while you surf. You have nothing to loose *** Personals *** FriendFinder OneandOnly Szivnet Kiss DatingClub www.singlesnet.com PrettyWomen *** e-cards *** NiceCards GreetingCards FREE movie-quality cards and screen savers to send in 4 unique ways. keep them forever! Webmaster Heaven Webmaster [EMAIL PROTECTED] If you feel offended in any way and want to stop receiving our monthly newsletter, please reply to this email with ?remove? in subject line. = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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Dear Eric, I'm writing my summer school course outline, and would like to know what the budget is for outside speakers before approaching anyone. The outline should be finished by the end of next week. best wishes, janeh application/ms-tnef
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SAT scores are approximately normal with mean 500 and a standard devotion 100. Scores of 800 or higher are reported as 800, so a perfect paper is not required to score 800 on the SAT. What percent of students who take the SAT score 800? The answer to this question shall be: SAT scores of 800+ correspond to z3; this is 0.15%. Please help me understand this. I dont understand how I get that z3??? and that it is 0.15%? Thanks for help = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
SAT z3 (Was: Re: (no subject))
Everything you need is in what you wrote. You do understand that "z" is the usual shorthand for "a standard score", and that a standard score is the representation of a given raw score as its deviation from the population mean in standard-deviation units? The rest is merely a lookup in a table of the standard normal distribution. (I find it to be somewhat less than 0.15%, though.) -- DFB. On Mon, 2 Apr 2001, Jan Sjogren wrote: SAT scores are approximately normal with mean 500 and a standard devotion 100. Scores of 800 or higher are reported as 800, so a perfect paper is not required to score 800 on the SAT. What percent of students who take the SAT score 800? The answer to this question shall be: SAT scores of 800+ correspond to z3; this is 0.15%. Please help me understand this. I don't understand how I get that z3??? and that it is 0.15%? Donald F. Burrill [EMAIL PROTECTED] 348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED] MSC #29, Plymouth, NH 03264 603-535-2597 184 Nashua Road, Bedford, NH 03110 603-471-7128 = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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well, this is a tricky sort of ? if in fact, all REAL scores that actually convert to a SAT value ... anything = to or than 800 are listed as ... 800 ... then, the ? really can't be ... what is the p value for having 800 or more ... has to be what is the p value for 800 but, the question being asked is probably wanting you to assume that scores could go larger than 800 ... so, for all practical purposes ... it amounts to a ? of 800 or more ... minitab would say: MTB cdf 800; SUBC norm 500 100. Cumulative Distribution Function Normal with mean = 500.000 and standard deviation = 100.000 xP( X = x ) 800.0.9987 MTB let k1=1-.9987 MTB prin k1 Data Display K10.0013 MTB let k2=100*k1 MTB prin k2 Data Display K20.13 ... as a percent ... about .13 of ONE percent ... about the value you have as the answer MTB At 08:23 PM 4/2/01 +, Jan Sjogren wrote: SAT scores are approximately normal with mean 500 and a standard devotion 100. Scores of 800 or higher are reported as 800, so a perfect paper is not required to score 800 on the SAT. What percent of students who take the SAT score 800? The answer to this question shall be: SAT scores of 800+ correspond to z3; this is 0.15%. Please help me understand this. I dont understand how I get that z3??? and that it is 0.15%? Thanks for help = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ = _ dennis roberts, educational psychology, penn state university 208 cedar, AC 8148632401, mailto:[EMAIL PROTECTED] http://roberts.ed.psu.edu/users/droberts/drober~1.htm = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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Re: By trial, or by subject?
In sci.stat.edu Rich Ulrich [EMAIL PROTECTED] wrote: : If it is some other data... When you have multiple replications, : sometimes you don't want the *mean* -- for "best single performance" : you might select maximum or minimum. Or you might consider a trimmed or in a situation where you expect an increasing trend, the final or last few obs might be best = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
Re: By trial, or by subject?
William Dunlap at Tulane has done some research on this. Do a lit search on his name. Jeff Rasmussen Spirit of Tao Te Ching Images of Taoism http://psychology.iupui.edu/tao TAO TE CHING... the Book, the Song, the Miniseries http://www.symynet.com Zen/Tao 10 Oxherding Pictures http://psychology.iupui.edu/ox/main.htm = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
Re: By trial, or by subject?
Hi Jim, Is it correct that you measured every subject 100 times (25 times in all 4 drugs/dose groups)? Then it might be a good idea to use a repeated measurement test. This tests takes into account that people may have a different 'base' temperature; it takes away some of the within group error and may give your test a greater power. It's easiest to use the mean of your 25 observations in the 4 groups, also because you don't seem to be interested in differences in temperature over time or something. Sky Jim Kroger heeft geschreven in bericht ... Hello, I've received some expert help here on a couple previous occasions (thanks). I have an issue bothering me, which I'd like to present to you. I'm doing a two-way, 2X2 ANOVA. Suppose I have 20 subjects, and each has 25 observations of the following types: drug1-doseA (25 for each subject) drug1-doseB ( " ) drug2-doseA drug2-doseB Each observation consists of the subject's temperature. The objective is to determine whether there is a main effect of either factor (drug type and doseage) on temperature, and whether there is an interaction between the two. My question is, should I determine an average for each subject in each of the four cells, and use this as data to put into the ANOVA, or should I put the raw trials themselves into the ANOVA? There would be 80 datapoints and 2000 data points respectively, 20 or 500 per cell. I have seen both approaches taken but never heard a satisfactory justification. It would seem they are not equivalent since the latter, having more observations, has greater power. What are the implications of each option? Thank you much, Jim = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
Re: By trial, or by subject?
In sci.stat.edu Jim Kroger [EMAIL PROTECTED] wrote: : Hello, I've received some expert help here on a couple previous occasions : (thanks). I have an issue bothering me, which I'd like to present to you. : I'm doing a two-way, 2X2 ANOVA. Suppose I have 20 subjects, and each has : 25 observations of the following types: no matter how you do it the proper analysis will be equivalent to using submect means. adding a replication factor would permit other tests (which you are not interested in) but due to their correlation structure the tests would not be valid. = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
Re: By trial, or by subject?
On 15 Jan 2001 17:23:11 GMT, Elliot Cramer [EMAIL PROTECTED] wrote: In sci.stat.edu Jim Kroger [EMAIL PROTECTED] wrote: : Hello, I've received some expert help here on a couple previous occasions : (thanks). I have an issue bothering me, which I'd like to present to you. : I'm doing a two-way, 2X2 ANOVA. Suppose I have 20 subjects, and each has : 25 observations of the following types: no matter how you do it the proper analysis will be equivalent to using submect means. adding a replication factor would permit other tests (which you are not interested in) but due to their correlation structure the tests would not be valid. As it was stated, Elliot nailed the first question. A valid ANOVA treats the average (sum) as its starting point. If this isn't the REAL data, then something else might be true. If those are 25 0/1 items, then you might do better to model them as logistic, or something else other than a linear sum - as someone suggested. If it is some other data... When you have multiple replications, sometimes you don't want the *mean* -- for "best single performance" you might select maximum or minimum. Or you might consider a trimmed mean. Or best consistency could be indicated by smallest SD, or the best performance over a specific range (that could be, something about the Confidence Interval). -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
Re: By trial, or by subject?
Jim, a few comments in addition to those made by other respondents: On Mon, 15 Jan 2001, Jim Kroger wrote in part: I'm doing a two-way, 2X2 ANOVA. Suppose I have 20 subjects, and each has 25 observations of the following types: drug1-doseA (25 for each subject) drug1-doseB ( " ) drug2-doseA drug2-doseB You have not stated how many subjects (Ss) receive each drug/dose combination. If all 20 Ss receive all 4 combinations, as implied by your assertion of 80 data points (below), then the design is not completely given: you must also have a factor representing the order in which the combinations were encountered by each S. If all Ss got the various drug/dose combinations in the same order, you have no way of telling whether (e.g.) the first combination affected responses to the later combinations, nor even in which direction. Also in this case, as one other respondent pointed out, you have a repeated-measures design: that is, instead of S(G x E) as in the usual 2-way ANOVA (using S for Subjects, G for druG, E for dosE), you have S x G x E, which implies (inter alia) different error terms for G, E, and GE. (In that notation, using R for the raw data values within each S, the two designs above would be R(S(B x E) and R(S) x G x E . As remarked below, the same ratios of mean squares are computed, whether R is explicitly accounted for in the design or not.) ... The objective is to determine whether there is a main effect of either factor (drug type and doseage) on temperature, and whether there is an interaction between the two. My question is, should I determine an average for each subject in each of the four cells, and use this as data to put into the ANOVA, or should I put the raw trials themselves into the ANOVA? As others have pointed out, it makes no difference. Your hypotheses are tested by comparisons among the cell means, and the denominator mean square for each hypothesis will be the estimated sampling variance of the means in question. Whether you use the mean of 25 trials for each S, or the 25 raw trials themselves, you get the same numbers. There would be 80 datapoints and 2000 data points respectively, 20 or 500 per cell. I have seen both approaches taken but never heard a satisfactory justification. It would seem they are not equivalent since the latter, having more observations, has greater power. As remarked above, this is not true. One has the same numerical estimates, and the same numbers of degrees of freedom in numerator and denominator, for each hypothesis test. As other respondents have mentioned, if the raw data are a 0/1 dichotomy, there may be an advantage in using a logistic rather than a normal model; but if the proportions (the several cell means) are not very close to 0 or 1, say between .25 and .75, there will not be much difference in the results of the analysis. -- Donald F. Burrill[EMAIL PROTECTED] 348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED] MSC #29, Plymouth, NH 03264 (603) 535-2597 Department of Mathematics, Boston University[EMAIL PROTECTED] 111 Cummington Street, room 261, Boston, MA 02215 (617) 353-5288 184 Nashua Road, Bedford, NH 03110 (603) 471-7128 = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
By trial, or by subject?
Hello, I've received some expert help here on a couple previous occasions (thanks). I have an issue bothering me, which I'd like to present to you. I'm doing a two-way, 2X2 ANOVA. Suppose I have 20 subjects, and each has 25 observations of the following types: drug1-doseA (25 for each subject) drug1-doseB ( " ) drug2-doseA drug2-doseB Each observation consists of the subject's temperature. The objective is to determine whether there is a main effect of either factor (drug type and doseage) on temperature, and whether there is an interaction between the two. My question is, should I determine an average for each subject in each of the four cells, and use this as data to put into the ANOVA, or should I put the raw trials themselves into the ANOVA? There would be 80 datapoints and 2000 data points respectively, 20 or 500 per cell. I have seen both approaches taken but never heard a satisfactory justification. It would seem they are not equivalent since the latter, having more observations, has greater power. What are the implications of each option? Thank you much, Jim -- Remove SPAMBLOCK to reply = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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Dear List, What software would you recommend for writing documents that contain mathematical symbols? Microsoft Word does not have all the symbols I need. Paul W. Jeffries Department of Psychology SUNY--Stony Brook Stony Brook NY 11794-2500 [EMAIL PROTECTED] = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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subscribe EDSTAT-L Daphne Kounali = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
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subscribe edstat-L Eduardo Bearzoti === This list is open to everyone. Occasionally, less thoughtful people send inappropriate messages. Please DO NOT COMPLAIN TO THE POSTMASTER about these messages because the postmaster has no way of controlling them, and excessive complaints will result in termination of the list. For information about this list, including information about the problem of inappropriate messages and information about how to unsubscribe, please see the web page at http://jse.stat.ncsu.edu/ ===
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Due to my PHD I'm preparing a questionnaire. But the popular is very large.I classified it into 35 categories. All I need, is to determine the sample size. is it proportional to the popular size? How can I determine that sample size?Please I need your help.sahar salah
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subscribe edstat-l Shareef Siddeek === This list is open to everyone. Occasionally, less thoughtful people send inappropriate messages. Please DO NOT COMPLAIN TO THE POSTMASTER about these messages because the postmaster has no way of controlling them, and excessive complaints will result in termination of the list. For information about this list, including information about the problem of inappropriate messages and information about how to unsubscribe, please see the web page at http://jse.stat.ncsu.edu/ ===
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subscribe edstat-l Marcelo Costa Souza, UFLA === This list is open to everyone. Occasionally, less thoughtful people send inappropriate messages. Please DO NOT COMPLAIN TO THE POSTMASTER about these messages because the postmaster has no way of controlling them, and excessive complaints will result in termination of the list. For information about this list, including information about the problem of inappropriate messages and information about how to unsubscribe, please see the web page at http://jse.stat.ncsu.edu/ ===
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Members, Can anyone provide me (a description or a reference will suffice) with a convincing argument or demonstration of WHY the first eigenvector-eigenvalue of the variance-covariance matrix represents the direction and magnitude of the greatest variability in the "cloud of multivariate data"? I can convince the students that this is what happens but I can't convince them of the why this is what happens. Thank you in advance for your help. Dr. Derek H. Ogle Northland College 127 Bobb Hall [EMAIL PROTECTED] www.northland.edu/dogle/ === This list is open to everyone. Occasionally, less thoughtful people send inappropriate messages. Please DO NOT COMPLAIN TO THE POSTMASTER about these messages because the postmaster has no way of controlling them, and excessive complaints will result in termination of the list. For information about this list, including information about the problem of inappropriate messages and information about how to unsubscribe, please see the web page at http://jse.stat.ncsu.edu/ ===
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