Answer to Question #223055 in Statistics and Probability for des

Question

In an attempt to increase business on Monday nights, a restaurant offers free dessert with every dinner order. Before the offer, the mean number of dinner customers on Monday nights was 152. The following are the numbers of diners on a random sample of 12 Monday nights while the offer was in effect.

206   169   191   152   212   139   142   151   174   220   192   153

Part (a)

Look at the above dot-plot of the data. Why does the plot suggest that it is okay to conduct a hypothesis test?

Part (b)

Test at the α = 0.05 level whether or not the dessert promotion increased the mean number of dinner customers on Monday nights. Carry out and show the 5 steps of hypothesis testing as outlined in The Framework of All Hypothesis Testing within this week's learning module.