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(c) Would you reject the nuli hypothesis that the mean satisfaction forthe two types of monitors is the same versus the two-sided altemative at significance level 0.05? Use your confidence interval to answer this ąuestion. Explain why you do not need to calculate the test statistic.

7.57    Refer to the previous exercise. A coworker suggested that you give the fiat screens to the next 10 employees who need new screens and the standard monitor to the following 10. Explain why your randomized design is better.

7.58    Pat wants to compare the cost of one- and two-bedroom apartments in the area of your campus. She collects data for a random sample of 10 advertisements of each type. Here are the rents for the two-bedroom apartments (in dollars per month):

595, 500, 580, 650, 675, 675, 750, 500, 495, 670

Here are the rents for the one-bedroom apartments:

500, 650, 600, 505, 450, 550, 515, 495, 650, 395

Find a 95% confidence interval for the additional cost of a second bedroom.

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