Homework Assignment 6

 Homework Assignment 6

Download and complete Homework Assignment 6 [DOCX].

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

Equipment Sales and Service Contracts Sold



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 for the difference  between the proportions of service contracts sold on treadmills versus  exercise bikes.
  2. Is there a major difference between the two pieces of equipment? Why or why not?
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