2. A supermarket chain wants to know if their "buy one, get one free" campaign increases customer traffic enough to justify the cost of the program. For each of 10 stores they select two days at random to run the test. For one of those days (selected by a coin flip), the program will be in effect. They want to test the hypothesis that there is no mean difference in traffic against the alternative that the program increases the mean traffic. The accompanying table shows the number of customer visits to each of the 10 stores. Complete parts a through i below. data-3 10 2020-1 38 . X Use data: Al X V f V v X A B 1 With Program Without Program data 151 143 W N 10 202 222 221 a) Are the data paired? 127 116 47 44 b) Find the mean difference. That is, the mean of the pairwise differences (With Program minus Without 332 333 Program) 141 138 121 121 c) Compute the standard deviation of the differences. 9 28 37 10 190 176 d) Compute the standard error of the mean difference. 11 143 149 e) Find the value of the t-statistic. 12 13 F) Find the degrees of freedom. + D G) Is the alternative one or two sided? - + H) Find the p-value? I) At alpha=0.05, what do you conclude