Statistics Assignment | Professional Writing Services

Homework Assignment 8Due 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 BikeTotal sold                   185                           123Service 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:

1. Construct a 95 percent confidence interval
2. l for the difference between the proportions of service contracts sold on treadmills versus exercise bikes.
3. Is there a major difference between the two pieces of equipment? Why or why not?