20. The NBA Finals Want to attend a pro-basketball game? The average resale prices for the NBA rematch of the Cleveland Cavaliers and the Golden State Warriors in 2017 compared to the average ticket prices in 2016 are given in the table that follows

a. If we were to assume that the prices given in the table have been randomly selected, test for a significant difference between the 2016 and the 2017 prices using a = .01.

b. Find a 99% confidence interval for the mean difference md = m2016 − m2017. Does this estimate confirm the results in part a?

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Game 2016 ($) 2017 ($) 1 1501 1357 234569 1393 1290 810 969 761 771 1544 1555 1019 685 1909 1662