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Author Question: Exhibit 8-6A sample of 75 information system managers had an average hourly income of $40.75 with a ... (Read 88 times)

kckanistras

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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


◦

1340.05 to 1459.95


◦

1400 to 1459.95


◦

1340.05 to 1400


◦

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


◦

1.96


◦

1.64


◦

1.28


◦

1.993

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by kckanistras on Mar 25, 2023

FireandIce

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Reply #1 on: Mar 25, 2023
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kckanistras

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Reply 2 on: Mar 25, 2023
Gracias!

sultana.d

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Reply 3 on: Yesterday
Wow, this really help

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