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 means and standard deviations for earnings of 1st, 2nd, 3rd, 4th, and Other year students.
b. Explain why it seems unlikely that population standard deviations are equal, as is required for use of ANOVA procedures to compare population means.