In an attempt to increase business on Monday nights, a restaurant decided to offer free deserts with a dinner. Before the change the mean number of customers on Monday nights was 158. For the 12 Mondays following the change, the below number of customers was observed: 206, 169, 191, 152, 212, 139, 142, 151, 174, 220, 192, 153 Assume a normal distribution for these data. Test whether the mean level of customers DIFFERED from 158 after the change. Use 5% significance level. | What is the CONCLUSION for the study? 1) Reject H0 and conclude there was an increase in customers. 2) Fail to Reject H0 and conclude the mean number of customers did not change. 3) Reject H0 and conclude the mean number of customers decreased. 4) Fail to Reject H0 and conclude the number of customers increased. 5) Fail to Reject the alternative H1 and conclude H0 is likely true. 6) No answer is correct. ------------------------------------- Enter: Integer 1, 2, 3, 4, 5, 6 no decimal