Answered: A safety engineer is testing for the…

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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Question

A safety engineer is testing for the severity of head injuries on crash test dummies. 98 crashes are tested and the severity of each head injury is measured on a scale of 0 to 1500. Minitab is used to summarize the data.

Variable N Mean StDev

Crash 98 611 182

Minimum Q1 Median Q3 Maximum

179 473 593 755 1077

Use the z-score rule to identify the severity scores that are considered outliers.

Question 5 options:

	Below 429 and above 793
	Below 50 and above 1178
	Below 179 and above 1077
	Below 247 and above 975

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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