Random and independent samples of 85 recent prime time airings from each of two major networks have been considered. The first network aired a mean of 110.7commercials during prime time, with a standard deviation of 4.3 commercials. The second network aired a mean of
109.3commercials, with a standard deviation of 4.4commercials. As the sample sizes are quite large, the population standard deviations can be estimated using the sample standard deviations. Construct a 95 %confidence interval for “ μ 1 μ
2, the difference between the mean number of commercials μ
1aired during prime time by the first network and the mean number of commercials μ
2aired during prime time by the second network. Then complete the table below.