Published on November 27, 2015
For more classes visit www.indigohelp.com Problem One Suppose that an automotive parts and accessories chain is experimenting with a new sales promotion. Two similar stores are selected for the experiment. For Store 1, nothing changes. This store constitutes the control group. For Store 2, the treatment group, the promotion is implemented. Sales in hundreds of dollars over a five-day period are as follows: Control: 6, 6, 7, 10, 12, 9, 6, 5, 5, 7 Treatment: 2, 5, 2, 4, 7, 1, 2, 3, 4, 5 The expectation that sales will be higher in the treatment group makes this a one-tailed test; the alternate hypothesis is m1 < m2. Use Excel to determine whether differences between the two groups are statistically significant.