Answered: The median number of part-time…

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 median number of part-time employees at fast-food restaurants in a particular city was
known to be 18 last year. City officials think the use of part-time employees may be increasing.
A sample of nine fast-food restaurants showed that seven restaurants were employing more
than 18 part-time employees, one restaurant was employing exactly 18 part-time employees,
and one restaurant was employing fewer than 18 part-time employees. Can it be concluded
that the median number of part-time employees has increased? Test using a = .05.

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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