Assignment Problem:
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:
|
Equipment Sales and Service Contracts Sold
|
|
|
Treadmill
|
Exercise Bike
|
|
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:
Problem 1: Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes.
Problem 2: Is there a major difference between the two pieces of equipment? Why or why not?
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