answer my homework questions

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?

Instructions

Complete the following:

Multiple Attempts Not allowed. This test can only be taken once.
Force Completion This test can be saved and resumed later.

QUESTION 1

  1. Construct a two proportion confidence interval. Calculate the upper confidence level.


10 points

QUESTION 2

  1. 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 55The 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.

    Compute the lower confidence level.


10 points

QUESTION 3

    1. There a major difference between the two pieces of equipment?





10 points

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