In article <E7AC96207335D411B1E7009027FC284902A9B4BE@EXCHANGE2>, Simon, Steve, PhD <[EMAIL PROTECTED]> wrote: >This message is in MIME format. Since your mail reader does not understand >this format, some or all of this message may not be legible.
>[EMAIL PROTECTED] writes: >> In Indiana, the school accountability legislation calls >> for locally produced assesments to be used. An assessment is to >> be given to about 1600 students in the high school in which I >> teach. This assessment will be given each September and May >> starting with the 2003-2004 school year. How large of a sample must be >> drawn from this population in order to approximate the mean score >> for all of the students? Is it possible to determine the size of >> the sample if there is no baseline data for this population with >> regards to this particular assessment? >I can't really believe that you would give a test to 1600 students and then >only grade a fraction of them. Wouldn't the students get upset about this? >If I took a test, I would be very interested in finding out how I did. For some of the accountability tests, the grade of each student is needed. For others, these grades are only used (stupidly, in my opinion) to grade the schools. If the maximum grade is 100, then grading all of the exams would still have a standard deviation of roughly .5 to .75 if the grades have a standard deviation of 20 to 30, and at most 1.25 in the worst case. If 100 chosen at random are graded, multiply these numbers by 4. -- This address is for information only. I do not claim that these views are those of the Statistics Department or of Purdue University. Herman Rubin, Deptartment of Statistics, Purdue University [EMAIL PROTECTED] Phone: (765)494-6054 FAX: (765)494-0558 . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
