A study was conducted to determine whether automobile repair charges are higher for female customers than for male customers. Twenty auto repair shops were randomly selected from the telephone book. Two cars of the same age, brand, and engine problem were used in the study. For each repair shop, the two cars were randomly assigned to a man and woman participant and then taken to the shop for an estimate of repair cost. The repair costs (in dollars) are given here.
a. Which procedure, t or Wilcoxon, is more appropriate in this situation? Why?
b. Are repair costs generally higher for female customers than for male customers? Use α = .05.

  • CreatedNovember 21, 2015
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