During the recent seasons, Major League Baseball has been criticized for the len

Question

During the recent seasons, Major League Baseball has been criticized for the length of the games. A report indicated that the average game lasted 3 hours and 30 minutes. A sample of 17 games revealed the following times to completion. (Note the minutes have been changed to fractions of hours, so that a games lasted 2 hours and 24 minutes is reported at 2.40 hours.)

2.98 2.40 2.70 2.25 3.23 3.17 2.93 3.18 2.80
2.38 3.75 3.20 3.27 2.52 2.58 4.45 2.45

Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.

Explanation / Answer

There are 17 values here and we don't know the population standard deviation, so we're going to do a one-sample t-test. Here's how it goes: Hypotheses: H0: mu>=3.5 Ha: mu

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