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Author Question: The Department of Economic and Community Development (DECD) reported that in 2009 the average number ... (Read 372 times)

trevg

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on: Mar 25, 2023

The Department of Economic and Community Development (DECD) reported that in 2009 the average number of new jobs created per county was 450.  The department also provided the following information regarding a sample of 5 counties in 2010.

County

New Jobs Created In 2010

Bradley

410

Rhea

480

Marion

407

Grundy

428

Sequatchie

400


a.Compute the sample average and the standard deviation for 2010.

b.

We want to determine whether there has been a significant decrease in the average number of jobs created.  Provide the null and the alternative hypotheses.

c.

Compute the test statistic.

d.

Compute the p-value; and at 95% confidence, test the hypotheses.  Assume the population is normally distributed.

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

zubair1583

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Reply #1 on: Mar 25, 2023
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trevg

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Reply 2 on: Mar 25, 2023
Great answer, keep it coming :)

yeungji

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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