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17. Suppose 75% of our customers are satisfied with our service. a. Use Minitab

ID: 3021560 • Letter: 1

Question

17. Suppose 75% of our customers are satisfied with our service.

a. Use Minitab to simulate randomly sampling 200 of our customers.**

b. A variable of 0’s and 1’s is generated. How do you interpret these?

c. Take the sum of this variable. What does it represent? (Calc -> Column Statistics ->select Sum -> select Input Variable)

d. Take the mean of this variable. What does the mean represent? (Calc -> Column Statistics -> select Mean -> select Input Variable)

** To do the simulation use: Calc -> Random Data -> Binomial -> Number of rows of data to generate: 200 -> set n = 1 and p = 0.75 and storage column

Explanation / Answer

17

a) For simulating random sampling 200 of customers.

Use the following path :

Calc->Random Data-> Binomial

Then Select number of trials as 1.

Event probability 0.75 and number of rows to produce be 200

b) 1 means customer is satisfied with service

0 means customer is not satiesfied with service

c) Sum of the variable as in my case is 139.

It represents out of 200 , 139 were satisfied with the service.

d) Mean of the variable is 0.695. that is out of 100,70 persons are satisfied with the service.

Mean represents the proportion of persons satisfied with the service

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