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 ALTERNATIVE HYPOTHESIS, H1 number. 1) H1: mean (greater than)> 158 2) H1: mean (greater than) > 175.06 3) H1: mean (less than) < 175.06 4) H1: mean Not Equal To 158 5) H1: mean (less than) < 158 6) No answer is correct. ------------------------------------- Enter: Integer 1, 2, 3, 4, 5, 6 no decimal