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. - X Data table Store # With Program Without Program 155 146 237 239 112 108 51 42 336 323 131 136 145 139 33 33 184 178 158 147