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#1 2012-10-03 01:45:21

cassrl
Member
Registered: 2012-10-03
Posts: 4

statistics

A standard measure of test anxiety is knnown to produce a u=19.  In the sample you draw of 86 the mean is equal 17.5 with a standard deviation s=10.

a-Use a level of 0.05 to test the hypothesis that the mean is less than 19.
b-find the 95% one sample confidence interval for the mean.

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#2 2012-10-03 04:16:42

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,791

Re: statistics

Hi cassrl;

What have you done with this problem? What is the null hypthesis and the alternative one? Do you know how to start the problem? How to get z here? Is it a two tailed test or a one tailed? Can I see a little of your work?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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