Suppose ages of people who own their homes are normally distributed with a mean of 42 years and a standard deviation of 3.2 years. approximately 75% of the home owners are older than what age?
38.2
39.9
44.2
48.6

the scores for a bowling tournament are normally distributed with a mean of 240 and a standard deviation of 100. julian scored 240 at the tournament. what percent of bowlers scored less than julian?
10%
25%
50%
75%

the odometer readings on a random sample of identical model sports cars are normally distributed with a mean of 120,000 miles and a standard deviation of 30,000 miles. consider a group of 6000 sports cars. approximately how many sports cars will have less than 150,000 miles on the odometer?
300
951
5048
5700