# IM3.7.7 Exit Ticket

Author:
Lind, Jon

1. Suppose that the durations of high school baseball games are approximately normally distributed with mean 105 minutes and standard deviation 11 minutes. Use your calculator to find the probability that a randomly selected high school baseball game lasts a. Less than 115 minutes. b. More than 100 minutes. c. Between 90 and 110 minutes. ﻿2. In Problem 1, you were told that the durations of high school baseball games are approximately normally distributed with a mean of 105 minutes and a standard deviation of 11 minutes. Suppose also that the durations of high school softball games are approximately normally distributed with a mean of 95 minutes and the same standard deviation, 11 minutes. Is it more likely that a high school baseball game will last between 100 and 110 minutes or that a high school softball game will last between 100 and 110 minutes? a. Answer this question without doing any calculations (you may want to sketch a normal curve for each). b. Use your calculator to verify the value of each probability.