Author Question: Exhibit 8-6A sample of 75 information system managers had an average hourly income of $40.75 with a ... (Read 63 times)

kckanistras · **on:** Mar 25, 2023

Question 1

Exhibit 8-5
A random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation of 240.

Refer to Exhibit 8-5. The 95% confidence interval for the SAT scores is

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1340.05 to 1459.95

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1400 to 1459.95

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1340.05 to 1400

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1400 to 1600

Question 2

Exhibit 8-6
A sample of 75 information system managers had an average hourly income of $40.75 with a standard deviation of $7.00.

Refer to Exhibit 8-6. If we want to determine a 95% confidence interval for the average hourly income, the value of “t” statistics is

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1.96

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1.64

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1.28

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1.993

FireandIce · **Reply #1 on:** Mar 25, 2023

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