Answered: (b) The life spans of three randomly…

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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I need help with part (b)

Transcribed Image Text:A certain brand of automobile tire has a mean life span of 37,000 miles and a standard deviation of 2,350 miles. (Assume the life spans of the tires have a bell-shaped distribution.) For the life span of 34,000 miles, z-score is - 1.28 (Round to the nearest hundredth as needed.) For the life span of 36,000 miles, z-score is -0.43. (Round to the nearest hundredth as needed.) For the life span of 31,000 miles, z-score is -2.55 (Round to the nearest hundredth as needed.) According to the z-scores, would the life spans of any of these tires be considered unusual? Yes O No (b) The life spans of three randomly selected tires are 32,300 miles, 41,700 miles, and 37,000 miles. Using the empirical rule, find the percentile that corresponds to each life span. The life span 32,300 miles corresponds to a percentile of The life span 41,700 miles corresponds to a percentile of The life span 37,000 miles corresponds to a percentile of (Round to the nearest whole number as needed.)

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