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The data below shows the mass of 40 students in a class. The measurement is to the nearest kg. Mass (kg) Frequency 145 -152 153 - 160 4 161 - 168 7 169 - 176 10 177 - 184 4

The data below shows the mass of 40 students in a class. The measurement is to the nearest kg. Mass (kg) Frequency 145 -152 153 - 160 4 161 - 168 7 169 - 176 10 177 - 184 4

MATLAB: An Introduction with Applications
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 data below shows the mass of 40 students in a class. The measurement is to the nearest kg. Mass (kg) Frequency 145 -152 153 - 160 4 161 - 168 169 - 176 10 177 - 184 4 185 - 192 6 193 - 200 7 Use the following four formulae, to find the standard deviation of the distribution. 2 Ef(x- x ) 1. n-1 nffx-(Efx)? n(n-1) 2. 2- nffd²-(Efd)? n(n-1) 3. (use an assumed mean of 164.5) nzfu²-(Efu)* * w? n(n-1) 4. s =
Transcribed Image Text:The data below shows the mass of 40 students in a class. The measurement is to the nearest kg. Mass (kg) Frequency 145 -152 153 - 160 4 161 - 168 169 - 176 10 177 - 184 4 185 - 192 6 193 - 200 7 Use the following four formulae, to find the standard deviation of the distribution. 2 Ef(x- x ) 1. n-1 nffx-(Efx)? n(n-1) 2. 2- nffd²-(Efd)? n(n-1) 3. (use an assumed mean of 164.5) nzfu²-(Efu)* * w? n(n-1) 4. s =
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