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Suppose the number of equipment sales and service contracts that a store sold during the last six (6) months for treadmills and exercise bikes was as follows:

Total sold 185 123
Service contracts 67 55

The store can only sell a service contract on a new piece of equipment. Of the 185 treadmills sold, 67 included a service contract and 118 did not.

Complete the following questions in the space provided below:Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes.Is there a major difference between the two pieces of equipment? Why or why not?
Instructions

Complete the following:Multiple Attempts Not allowed. This test can only be taken once.Force Completion This test can be saved and resumed later. Question Completion Status:QUESTION 1Construct a two proportion confidence interval. Calculate the upper confidence level.

10 points QUESTION 2Suppose the number of equipment sales and service contracts that a store sold during the last six (6) months for treadmills and exercise bikes was as follows: Treadmill Exercise BikeTotal sold 185 123Service contracts 67 55The store can only sell a service contract on a new piece of equipment. Of the 185 treadmills sold, 67 included a service contract and 118 did not.Complete the following questions in the space provided below:Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes.Compute the lower confidence level.

10 points QUESTION 3There a major difference between the two pieces of equipment?
True False

10 points

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