Commuting Times The average resident of a certain East Coast suburb spends 42 minutes per day commuting, with a standard deviation of 12 minutes. Assume a normal distribution. Find the percent of all residents of this suburb who have the following commuting times. 52. At least 50 minutes per day 53. No more than 40 minutes per day 54. Between 32 and 40 minutes per day 55. Between 38 and 60 minutes per day 56. 1.Q. Scores On standard IQ tests, the mean is 100, with a standard deviation of 15. The results are very close to fitting a normal curve. Suppose an IQ test is given to a very large group of people. Find the percent of those people whose IQ scores are as follows. (a) More than 130 (b) Less than 85 (c) Between 85 and 115