Question

Consider the following data: x 4 5 6 7 8 P(X=x) 0.2 0.2 0.1 0.2 0.3...

Consider the following data:

x 4
5
6
7
8
P(X=x)
0.2
0.2
0.1
0.2
0.3

Step 3 of 5 :

Find the standard deviation. Round your answer to one decimal place.

Homework Answers

Answer #1
x P(x) x * P(x) x2 * P(x)
4 0.2 0.8 3.2
5 0.2 1 5
6 0.1 0.6 3.6
7 0.2 1.4 9.8
8 0.3 2.4 19.2
1 6.2 40.8

Standard deviation = =X 2 * P(X) - 2  

=40.8 -38.44

  =2.36

= 1.5362

Standard deviation = 1.5

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