The following data represent the repair cost for a low-impact collision in a simple random sample of mini- and micro-vehicles (such as the Chevrolet Aveo or Mini Cooper).

(a) Draw a normal probability plot to determine if it is reasonable to conclude the data come from a population that is normally distributed.
(b) Draw boxplot to check for outliers.
(c) Construct and interpret a 95% confidence interval for the population mean cost of repair.
(d) Suppose you obtain a simple random sample of size n = 10 of a Mini Cooper that was in a low-impact collision and determine the cost of repair. Do you think a 95% confidence interval would be wider or narrower? Explain.