MAT 510 Strayer University Confidence Intervals Suppose the number of equipment sales and service contracts that a store sold during the last six (6) month

MAT 510 Strayer University Confidence Intervals 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 195 138
Service contracts 60 45

The store can only sell a service contract on a new piece of equipment. Of the 195 treadmills sold, 60 purchased a service contract. Of the 138 exercise bikes, 45 purchased a service contract.
Remember to watch the instructional video and use the excel template provided to help you with the math.
Complete the following questions in the space provided below:

Is there a major difference between the two pieces of equipment? Why or why not?
Interpret the meaning of the confidence interval for Treadmills at a 95% confidence level.
Interpret the meaning of the confidence interval for Exercise Bikes at a 95% confidence level.
Are confidence intervals one-tailed or two-tailed?
Construct a 95 percent confidence interval for the difference between the proportions of service contracts sold on treadmills versus exercise bikes. Confidence Interval (C.I.) on difference between two proportions
Treadmill
p1
195
q1
60
n1
Service
contract
zc
sigma(p1)
195

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