The time from purchase until major repairs are required is recorded for eight cheap bicycles and five expensive bicycles with the following results in days: cheap bikes—39, 117, 561, 57, 3, 27, 8, 2; expensive bikes—289, 641, 105, 111, 903.

a. Is it reasonable to perform a parametric test (test based on a normal distribution) on these figures?

b. Regardless of your answer to

a, perform a parametric test; in addition, perform a nonparametric test.

c. Do you believe that cheap bikes last as long as expensive bikes? Discuss. POLI967