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# The following information shows the yearly salaries (in $1,000) of samples of physicians for 2013 ... wrote... Posts: 78 Rep: 3 weeks ago The following information shows the yearly salaries (in$1,000) of samples of physicians for 2013 and 2012.

(1)

(2)

Year 2013

Year 2012

Sample Size

280

244

Sample Mean

790

685

### Population Standard Deviation (s)

100

110

We want to perform a test to determine if there has been a significant increase in the salaries of physicians.  In your computations, please use “1” to represent year 2013.

a.  State the null and alternative hypotheses to be tested.

Ho:

Ha:

b.  Compute the test statistic.

c.  The null hypothesis is to be tested at 95% confidence.  Determine the critical value from the table.

d.  What do you conclude?  Fully explain and answer the question.

e.  Compute the p-value.

Textbook

## Essentials of Statistics for Business and Economics

Edition: 7th
Authors:
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Answer verified by a subject expert
blf1210blf1210
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Posts: 77
Rep:
3 weeks ago
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lindseyw Author
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 Correct TY
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 I appreciate what you did here, answered it right
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