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Question 1 of 5 20.0 Points Explain the difference between the null hypothesis and alternative hypothesis. Which one can be proven in a statistical

Question 1 of 5

20.0 Points

Explain the difference between the null hypothesis and alternative hypothesis. Which one can be proven in a statistical sense?

Question 2 of 5

20.0 Points

How can you determine when to use a lower one‐tailed test of hypothesis versus an upper one‐tailed test?

Question 3 of 5

20.0 Points

Explain the purpose of the chi‐square test for independence. Provide some practical examples where this test might be used in business.

Question 4 of 5

20.0 Points

Explain the difference between simple and multiple linear regression.

Question 5 of 5

20.0 Points

Explain what is the coefficient of determination, R^2 (R-squared)? What does it measure?

Part 1 of 1 -

Question 1 of 4

25.0 Points

Solve Problem and Applications:Solve Problem and Applications:ch 5- prob1 (use excel file Call Center Data)

5-1: 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 centers 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.

As you formulate and test a hypothesis using these data, how should the null and alternative hypothesis statements be written?

A.Ho: The average employee tenure is < 2.0

H1: The average employee tenure is ≥ 2.0

B.Ho: The average employee tenure is ≥ 2.0

H1: The average employee tenure is < 2.0

C.Ho: The average employee tenure is ≥ 2.0

H1: The average employee tenure is > 2.0

D.Ho: The average employee tenure is > 2.0

H1: The average employee tenure is < 2.0

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Question 2 of 4

25.0 Points

Solve Problem and Applications:Solve Problem and Applications:ch 5- prob1 (use excel file Call Center Data)

5-1: 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 centers 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.

As you formulate and test a hypothesis using these data, what is the value of the t Test Statistic?

A.0.5

B.1.89

C.- 0.84

D.0.0

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Question 3 of 4

25.0 Points

Solve Problem and Applications:Solve Problem and Applications:ch 5- prob1 (use excel file Call Center Data)

5-1: 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 centers 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.

As you formulate and test a hypothesis using these data, what is the Critical Value?

A.-1.667

B.2.0

C.-1.5

D.0.0

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Question 4 of 4

25.0 Points

Solve Problem and Applications:Solve Problem and Applications:ch 5- prob1 (use excel file Call Center Data)

5-1: 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 centers 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.

As you formulate and test a hypothesis using these data, what is your final conclusion?

A.Reject the null hypothesis

B.Do not reject the null hypothesis

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