Assignment

1. Call centers typically have high turnover. The director of human resources for a large bank has compiled data on about 70 former employees at one of the bank's call center in the Excel file Call Center Data. In writing an article about call center working conditions, a reporter has claimed that the average tenure is no more than two years. Formulate and test a hypothesis using these data to determine if this claim can be disputed.

5. The Excel file Sales Data provides data on a sample of customers. An industry trade publication stated that the average profit per customer for this industry was at least $4,500. Using a test of hypothesis, do the data support this claim or not? The company believes that their average profit exceeds $4,500. Test a hypothesis to determine if there is evidence to support this.

9. Using the data in the Excel file Consumer Transportation Survey, test the following null hypothesis:

a. Individuals spend at least 10 hours per week in their vehicles.
b. Individuals drive an average of 450 miles per week.
c. The average age of SUV drivers is no greater than 35.
d. At least 75% of individuals are satisfied with their vehicles.

11. The Excel file Baseball Attendance shows the attendance in thousands at San Francisco Giants' baseball games for the 10 years before the Oakland A's moved to the Bay Area in 1968, as well as the combined attendance for both teams for the next 11 years. Is there a statistical reason to believe that overall attendance has changed after the A's move?

Attachment:- Assignment.xlsx