Repeat exercise 1, parts b and c, using a 90% confidence interval. Is the population mean annual
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a. Find the average, standard deviation, and standard error for annual salary based on this sample.
b. Find the 95% confidence interval for the population mean salary.
c. Draw a graph in the style of Figure 9.1.5 indicating the sample average and confidence interval.
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a No the population mean is not in the 90 conf...View the full answer
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