Expected Value of a Discrete Random Variable Below is a table of X and its frequency. What is the mean of X? What is the standard deviation of X? What is the variance of X? X Frequency 2 20% 5 10% 8 15% 10 30% 12 25%

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  1. Expected Value of a Discrete Random Variable

Below is a table of X and its frequency. What is the mean of X? What is the standard deviation of X? What is the variance of X?

X

Frequency

2

20%

5

10%

8

15%

10

30%

12

25%

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