Suppose someone claims that students in higher years at school tend to earn more money, because they are older and have more work experience.
a. Use software to access the student survey data, and find the sample sizes, medians, means, and standard deviations for earnings of 1st, 2nd, 3rd, 4th, and other year students.
b. Do the means seem to support the claim that students in higher years earn more?
c. Do the medians seem to support the claim?
d. Use software to produce side-by-side boxplots of the data.
e. Considering the appearances of the distributions, which would be better to report the centers: means or medians?
f. The three highest outliers occur in which two of the groups? Do earnings in these two years also have the highest standard deviations?