Find the standard deviation.  x  P(x) 0  0.2 1  0.2 2  0.4 3  0.2 Please

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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  1. Complete the expected value table 

 

P(x)

0.2

0.2

0.4

0.2

 

(a) Find the expected value from the expected value table? 

=0*0.2+1*0.2+2*0.4+3*0.2

=(0+0.2+0.8+0.6)

=1.6

  1. Find the standard deviation. 

P(x)

0.2

0.2

0.4

0.2

Please find only the standard deviation of the second chart plz and thanks.

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