Question
Winter Olympics 2010 downhill Fifty-nine men quali-
fied for the men’s alpine downhill race in Vancouver. The
gold medal winner finished in 114.3 seconds. All com-
petitors’ times (in seconds) are found in the followinglist (espn.go.com/olympics/winter/2010/results/_/sport/1/
event/2):a) The mean time was 117.34 seconds, with a standard
deviation of 2.465 seconds. If the Normal model is
appropriate, what percent of times will be less than
114.875 seconds?
b) What is the actual percent of times less than 114.875
seconds?
c) Why do you think the two percentages don’t agree?
d) Create a histogram of these times. What do you see?
114.3
115.0
115.7 116.7
118.6 119.8
114.4 115.2
115.8 116.7 118.7 120.0
114.4 115.2
116.0 117.0 118.8 120.1
114.5 115.3
116.1 117.2 118.9 120.6
114.6 115.3
116.2 117.2 119.2
121.7
114.7 115.4
116.2 117.4 119.5 121.7
114.8 115.4
116.3 117.7 119.6 122.6
114.8 115.5
116.4 117.9 119.7 123.4
114.9 115.6
116.6 118.1
119.8 124.4
114.9
115.7
116.7
118.4
119.8

Image Transcription

114.3 115.0 115.7 116.7 118.6 119.8 114.4 115.2 115.8 116.7 118.7 120.0 114.4 115.2 116.0 117.0 118.8 120.1 114.5 115.3 116.1 117.2 118.9 120.6 114.6 115.3 116.2 117.2 119.2 121.7 114.7 115.4 116.2 117.4 119.5 121.7 114.8 115.4 116.3 117.7 119.6 122.6 114.8 115.5 116.4 117.9 119.7 123.4 114.9 115.6 116.6 118.1 119.8 124.4 114.9 115.7 116.7 118.4 119.8

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