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Test for Proportions/ttest ensiu
Posted:
Apr 9, 1997 10:23 PM


 Forwarded message from Rudy Wiegand 
In teaching my classes, I've always stressed that under the usual assumptions with variance unknown, the ttest is appropriate and should always be used; however, a student recently posed a question which I could not answer. If doing a C.I. on proportions you don't know p, then you also don't know the variance. The question the students asked was Why don't we use the tvalue when we form a C.I. on a proportion?
There is a great deal of logic to their question since clearly p is not normal. Anyone with any ideas?
 End of forwarded message from Rudy Wiegand 
I don't know. The text I use (Siegel) DOES use the tdistribution.
_   Robert W. Hayden   Department of Mathematics /  Plymouth State College MSC#29   Plymouth, New Hampshire 03264 USA  *  Rural Route 1, Box 10 /  Ashland, NH 032179702  ) (603) 9689914 (home) L_____/ hayden@oz.plymouth.edu fax (603) 5352943 (work)



