The road transport and safety agency set up a radar checkpoint and recorded the speed in kilometers per hour of a random sample of 50 cars that passed this checkpoint in one hour. The speeds of the cars were recorded as follows;7466655548565065756776685065606560516876687768655252636580706581706353456555716455706445666440665571 Make a frequency distribution table using 5 as a class widthFind the mean and standard deviationWhat value represents the median

Data given 40, 45, 45, 48, 50, 50, 51, 52, 52, 53, 55, 55, 55, 55, 56, 60, 60, 63, 63, 64, 64, 64,…

Answered: The road transport and safety agency…

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 road transport and safety agency set up a radar checkpoint and recorded the speed in kilometers per hour of a random sample of 50 cars that passed this checkpoint in one hour. The speeds of the cars were recorded as follows;

74	66	65	55	48
56	50	65	75	67
76	68	50	65	60
65	60	51	68	76
68	77	68	65	52
52	63	65	80	70
65	81	70	63	53
45	65	55	71	64
55	70	64	45	66
64	40	66	55	71

Make a frequency distribution table using 5 as a class width
Find the mean and standard deviation
What value represents the median

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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