(13)

Fast food their "Buy One, Get One Free" program increases customer traffic enough to support the cost of the program. For each of 15 stores, one day is selected at random to record customer traffic with the program in effect, and one day is selected at random to record customer traffic with program not in effect. The results of the experiment are documented below. At proportional to = 0.05, test the hypothesis that the mean difference is at most 0 (at best the program makes no difference, or worse it decreases traffic)

against the alternative that the mean difference > 0 ( the program increases traffic).

DATA:

with program/// 144//236//108//43//337//134//148//30//181//146//159//248//150//54//349

without program// 140//233//110//42//332//135//151//33//178//147//162//243//149//48//346

a) the pvalue rejects H0

b) the pvalue of 0.084 provides weak evidence against H0

c)none

d) the pvalue of 0.002 provides overwhelming evidence against H0

e) the pvalue of 0.221 indicates that the data provide insignificant evidence against H0