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MAT 510 WEEK 9 HOMEWORK ASSIGNMENT 8
MAT510 Week 9 Homework Assignment 8 STR
Due in Week 9 and worth 30 points
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:
Treadmill Exercise Bike
Total sold 195 133
Service contracts 77 55
The store can only sell a service contract on a new piece of equipment. Of the 195 treadmills sold, 77 included a service contract and 118 did not.
Complete the following questions in the space provided below:
1. 1. Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes.
2. 2. Is there a major difference between the two pieces of equipment? Why or why not?