The Following Information Shows the Yearly Salaries in $1,000) of Samples

question 119

Essay

The following information shows the yearly salaries in $1,000) of samples of physicians for 2013 and 2012.
$\begin{array}{|c|c|c|}\hline & \text { 1) } & \text { 2) } \\\hline & \text { Year 2013 } & \text { Year 2012 }\\\hline \text { Sample Size } & 280 & 244 \\\hline \text { Sample Mean } & 790 & 685 \\\hline \text { Population Standard Deviation o) } & 100 & 110 \\\hline\end{array}$ 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. H0:
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.

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Definitions:

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Delacroix

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Nadar

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