# Question

Assume that the differences are normally distributed.

(a) Determine di = Xi - Yi for each pair of data.

(b) Compute d-bar and sd.

(c) Test if µd < 0 at the α = 0.05 level of signiﬁcance.

(d) Compute a 95% conﬁdence interval about the population mean difference µd.

(a) Determine di = Xi - Yi for each pair of data.

(b) Compute d-bar and sd.

(c) Test if µd < 0 at the α = 0.05 level of signiﬁcance.

(d) Compute a 95% conﬁdence interval about the population mean difference µd.

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