Posted by **Williams** on Saturday, November 30, 2013 at 1:42pm.

Consider the following hypothesis statement using alpha = .05, and data from two independent samples:

Ho: µ1 - µ2 = 0

Ha: µ1 - µ2 not equal to 0

X1 = 237, X2 = 218

¬1 = 54, ¬2 = 63

n1 = 42, n2 = 35

a) Calculate the appropriate test statistic and interpret the result. b) Calculate the p value and interpret the result.

- Math.stat help :( -
**PsyDAG**, Sunday, December 1, 2013 at 12:19pm
Ho: mean1 = mean2

Ha: mean1 ≠ mean2

Since these are just samples rather than the whole population, µ is an inappropriate designation. µ is parameter rather than a statistic.

Z = (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 related to the Z score.

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