Answered: Quarter-Mile times 0.91 0.97 1.03 0.89…

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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The following times were recorded by the quarter-mile and mile runners of a university track team (times are in minutes).

Quarter-Mile times	0.91	0.97	1.03	0.89	0.98
Mile times	4.52	4.45	4.50	4.70	4.60

After viewing this sample of running times, one of the coaches commented that the quarter-milers turned in the more consistent times. Use the standard deviation and the coefficient of variation to summarize the variability in the data.

Compute the sample standard deviation (in min) for quarter-mile runners and one-mile runners. (Round your answers to four decimal places.)

quarter-mile runners minone-mile runners min

Compute the coefficient of variation for quarter-mile runners and one-mile runners. (Round your answers to one decimal place.)

quarter-mile runners %one-mile runners %

Does the use of the coefficient of variation indicate that the coach's statement should be qualified?

Comparing the coefficient of variations show that the coach's statement ---Select--- should not should be qualified because it shows that the quarter-milers' times are ---Select--- equally more less variable.

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