Here are some questions I might ask myself in thinking through such a problem:
1. Why do you want to compare the data? What are you trying to learn about the data?
2. How do you make your comparison "fair"? What would be the impact of different sample sizes and different scales (4-pt vs 5-pt)? Were both means summed over the same 9 questions?
3. What statistic seems most appropriate, given your question and what you know about population parameters?
Good Luck!
Hugh
On Tuesday, November 26, 2002, at 08:47 PM, 赵玉芳 wrote:
Hugh Foley,！----------------------------------------
I forget it, the mean of 24.37 summation over 9 questions,my sample size is 190,the correspondence sample size is 54.
It is a very important homework for me.I overlook the original questionnaire is a 5-pt scale,and i used it as a 4-pt scale .Oh now I dont know how to compare !
Thank you help me!
======= 2002-11-26 09:27:00 =======
Homework problem? How does a mean of 24.37 emerge from a 4-pt scale?[EMAIL PROTECTED]
Summation over many questions?
Hugh
On Tuesday, December 17, 2002, at 10:45 PM, 赵玉芳 wrote:
Hello,----------------------------------------
I have a problem.I collected some data with Likert 4 point
scale,and there also some data about the same questionnaire but
collected with likert 5 point scale and there have no orignal data
yet,I only can see the Mean and SD . Now how to compare them?
e.g. my data's Mean and SD are 24.37 5.64
the correspondence data's Mean and SD are 26.37 12.68
Is there some one would like to tell me how to compare the data.
Thanks.
[EMAIL PROTECTED]
2002-12-18
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Hugh J. Foley, Ph.D.
Professor
Department of Psychology
Skidmore College
Saratoga Springs, NY 12866
(518) 580-5308
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2002-11-27
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Department of Psychology
Skidmore College
Saratoga Springs, NY 12866
(518) 580-5308
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