8. Let the random variable X represent the distribution of grades for group A. The probability distribution of the grades for group A is X f(x) 50 0.10 65 0.20 80 90 100 0.35 0.30 0.05 The probability distribution for the grades for group B is X f(x) 65 0.10 75 0.30 85 95 100 0.25 0.25 0.10 Determine which group has a greater variance for the probability distribution for grades.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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8. Let the random variable X represent the distribution of grades for group A. The probability distribution
of the grades for group A is
X
f(x)
50
0.10
65
0.20
80
90
100
0.35
0.30
0.05
The probability distribution for the grades for group B is
X
f(x)
65
0.10
75
0.30
85
95
100
0.25
0.25
0.10
Determine which group has a greater variance for the probability distribution for grades.
Transcribed Image Text:8. Let the random variable X represent the distribution of grades for group A. The probability distribution of the grades for group A is X f(x) 50 0.10 65 0.20 80 90 100 0.35 0.30 0.05 The probability distribution for the grades for group B is X f(x) 65 0.10 75 0.30 85 95 100 0.25 0.25 0.10 Determine which group has a greater variance for the probability distribution for grades.
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