Suppose a sporting goods store sold treadmills, exercise bikes, and equipment service contracts over the past six months as shown in the table below.

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Suppose a sporting goods store sold treadmills, exercise bikes, and equipment service contracts over the past six months as shown in the table below.
Equipment and Service Contract Sales

Treadmill
Exercise Bike
Equipment Sales
195
133
Service Contract Sales
77
65

The store can only sell a service contract on a new piece of equipment. Of the 195 treadmills sold, 77 included a service contract and 118 did not.
Respond to the following in a Word document and submit:

-Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes.
S1 = number of service contracts for sold treadmills
S2 = number of service contracts for sold Exercise Bikes

P1 = 67/185 = .3948717
P2 = 55/123 = .48872180

P=n1p1 +n2p2/ n1 + N2 = 195*.395 + 133*.489/ 195 + 133 =

Standard Error = .

Margin of Error =
Lower Limit =
Upper Limit =

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