# Question: Break down the annual salaries into three groups according to

Break down the annual salaries into three groups according to training level (A, B, or C).

a.* Draw box plots to compare these three groups. Comment on what you see.

b.* Find the average for each training level, and comment.

c.* Find the between-sample and the within-sample variabilities and their respective degrees of freedom.

d. Find the F statistic and its numbers of degrees of freedom.

e. Perform the F test at level 0.05 and report the results.

f. Report the results of the least-significant-difference test, if appropriate.

g. Summarize what you have learned about the database from this problem.

a.* Draw box plots to compare these three groups. Comment on what you see.

b.* Find the average for each training level, and comment.

c.* Find the between-sample and the within-sample variabilities and their respective degrees of freedom.

d. Find the F statistic and its numbers of degrees of freedom.

e. Perform the F test at level 0.05 and report the results.

f. Report the results of the least-significant-difference test, if appropriate.

g. Summarize what you have learned about the database from this problem.

## Answer to relevant Questions

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