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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

bobbym
2012-10-04 02:16:42

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?

cassrl
2012-10-03 23:45:21

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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