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How do you parts c and d?

How do you parts c and d?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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How do you parts c and d?
Terri Vogel, an amateur motorcycle racer, averages 129.12 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.29 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( 129.12 2.29 b. Find the proportion of her laps that are completed between 129.04 and 131.97 seconds. 0.4073 c. The fastest 2% of laps are under seconds. d. The middle 60% of her laps are from seconds to seconds.
Transcribed Image Text:Terri Vogel, an amateur motorcycle racer, averages 129.12 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.29 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( 129.12 2.29 b. Find the proportion of her laps that are completed between 129.04 and 131.97 seconds. 0.4073 c. The fastest 2% of laps are under seconds. d. The middle 60% of her laps are from seconds to seconds.
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