During the 2003 season, Major League Baseball took steps to speed up the play of baseball games in order to maintain fan interest. The following results come from a sample of 60 games played during the summer of 2002 and a sample of 50 games played during the summer of 2003. The sample mean shows the mean duration of the games included in each game.
2002 Season 2003 Season
Sample size 60 Sample size 50
Sample mean 172 minutes Sample size 166 minutes
A) A research hypothesis was that the steps taken during the 2003 season would reduce the population mean duration of baseball games. Which of the following shows the right null hypothesis and alternative hypothesis?