The Harry Potter books and movies grossed huge sums of money. The table below lists the amounts grossed (in millions of dollars) during the first few days of release of the movies Harry Potter and the Half-Blood Prince and Harry Potter and the Order of the Phoenix. Use a 0.05 significance level to test the claim that Harry Potter and the Half-Blood Prince did better at the box office. Apart from this hypothesis test, what is a better way to judge the validity of the claim?
Assume that the paired sample data are simple random samples and that the differences have a distribution that is approximately normal.

  • CreatedMay 03, 2015
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