Terri Vogel, an amateur motorcycle racer, averages 129.5 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.27 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the proportion of her laps that are completed between 128.36 and 130.41 seconds. c. The fastest 4% of laps are under seconds. d. The middle 40% of her laps are from seconds to seconds
Terri Vogel, an amateur motorcycle racer, averages 129.5 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.27 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the proportion of her laps that are completed between 128.36 and 130.41 seconds. c. The fastest 4% of laps are under seconds. d. The middle 40% of her laps are from seconds to seconds
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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Terri Vogel, an amateur motorcycle racer, averages 129.5 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.27 seconds . The distribution of her race times is
a. What is the distribution of X? X ~ N(,)
b. Find the proportion of her laps that are completed between 128.36 and 130.41 seconds.
c. The fastest 4% of laps are under seconds.
d. The middle 40% of her laps are from seconds to seconds
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