not so easy to answer 1. how many items are there? certainly ... i hope not only 1 2. i assume you will be SUMMING across items, correct? 3. what sort of power/beta do you want ... are willing to tolerate? 4. how large of a DIFFERENCE do you want to be able to find ... ? 5. what is the approximate size of a standard deviation on the scale?
all these things you have to know/have estimates for before you can answer your question At 01:38 AM 6/30/02 +0000, MPGartland wrote: >I am familiar with the sample size determination test for continuous data, >but not discrete data such as a likert scale survey. > >Basically, I am analyzing a 4 point likert scale that will be broken into 5 >cohorts. How do I determine the minimum sample size required for >significance. I will likely use an alpha of .05. > >thanks > >[EMAIL PROTECTED] > > >. >. >================================================================= >Instructions for joining and leaving this list, remarks about the >problem of INAPPROPRIATE MESSAGES, and archives are available at: >. http://jse.stat.ncsu.edu/ . >================================================================= . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
