C calculate m 1 and m 2 2 points total 1 point per

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c. Calculate M 1 and M 2
d. Calculate df 1 , df 2 , and df
e. Calculate estimated variance for population 1 ( s 1 2 ) and estimated variance for population 2 ( s 2 2 )
f. Calculate the pooled variance ( S pooled 2 ) from the two population variances (from question e above)
g. Use the pooled variance (from question f above) to calculate the variance for sampling distribution 1 ( S M1 2 ) and the variance for sampling distribution 2 ( S M2 2 )
h. Calculate standard deviation ( S diffmean )of the comparison distribution
i. Calculate the t statistic
j. For the two-tailed test, find the critical t values for this hypothesis test based on the total degree of freedom (from question d above), and the preset alpha level. (1 point total)
k. Compare the calculated t statistic with the critical t value by stating which is more “extreme”, and then draw a conclusion about the hypothesis test by stating clearly “reject” or “fail to reject” the null hypothesis. (2 points total: 1 for comparison, 1 for decision)
PSY230 SpringA2019
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