# Question

View this database as a population. Consider the following sample of five employee numbers from this database: 24, 54, 17, 34, and 53.

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.

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.

## Answer to relevant Questions

Viewing the database in Appendix A as a random sample from a much larger population, consider the percentage who are advanced (at training level B or C). Find the 99% confidence interval. Repeat exercise 1, parts b and c, using a 90% confidence interval. Is the population mean annual salary in the interval? a. Find the average, standard deviation, and standard error for annual salary based on this sample. b. ...a. What is the purpose of hypothesis testing? b. How is the result of a hypothesis test different from a confidence interval statement? a. What is Student’s t test? b. Who was Student? What was his contribution? If the list price of the Eureka 4750A Bagged Upright Vacuum cleaner is $79.99, is the average price, based on the data from Table 9.6.1, significantly different from a 10% discount?Post your question

0