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Business statistics homework 9 for profstan only

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Homework Assignment 8

 

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                       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:

  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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    Submitted by PROFSTAN on September 4th, 2016 17:32

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