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February 28, 2015

February 28, 2015

Posted by **emily** on Sunday, April 29, 2012 at 3:11pm.

a. calculate the z test statistic.

b. what is the p-value?

c. would this null hypothesis be rejected or not? justify answer with the p-value.

- statistics -
**PsyDAG**, Monday, April 30, 2012 at 2:33pmZ = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√n

If only one SD is provided, you can use just that to determine SEdiff.

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

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