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February 26, 2015

February 26, 2015

Posted by **Janice** on Wednesday, July 10, 2013 at 3:02am.

a) Did this sample of males consume significantly more energy drinks than the overall population average? Use a one-tailed test with a a=.01

b) Did this sample of females consume significantly fewer energy drinks than the overall population average? Use a one-tailed test with a a=.01

- statistics -
**PsyDAG**, Wednesday, July 10, 2013 at 1:44pmZ = (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/probability for each Z score.

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