Question:

Perform the following hypothesis test on the paired data below:

H _O :  _d = 0 ( Please recall that  _d is read ~ and also known as ~ Mu-sub-d )

H _A :  _d ≠ 0 Test at  = 0.05

1. Is this an upper tail , lower tail , or two-tail test? (4 points)
2. Are we testing means or proportions? (4 points)
3. State the rule of rejection (in terms of p-value and level of significance) (4 points)
4. Find the p-value (4 points)
5. Should you reject or not reject H _O ? (4 points)
6. Do the data provide sufficient evidence to suggest the After scores are indeed higher?

Why or why not? (4 points)

Note: Because the above is a two-tail test, rejection of Ho alone is not a sufficient reason. Hint: What else did you observe among the sample results ?

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