Answered: Which statement about deleting 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 shopper at a local supermarket has spent these amounts in his last eight trips to the store:

$32.92, 14.14, 30.80, 28.34, 75.58, 36.33, 33.51, and 22.94.

Which statement about deleting the amount spent of $75.58 is false?

a. The median of this data set may be more representative of the mean.

b. The value of the mean would be reduced by $5.89.

c. The value of the mean would not change.

d. The value of the mean would be greatly reduced.

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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