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The table shows the distribution of household sizes in the United States for a recent year....

The table shows the distribution of household sizes in the United States for a recent year.

x

1

2

3

4

5

6

7

P(x)

0.281

0.340

0.154

0.129

0.060

0.022

0.013

Find:

a)The mean

b)The variance

c) The Standard deviation

D) the expected value

math   Statistics-And-Probability   
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Answer #1

a)mean =(1)(0.281)-(2)(0.340)-(3)(0.154)-(4)(0.129)-(5)(0.060)-(6)(0.022)-(7)(0.013) 2.462 b)Ex2 ΣΧ2p(x) (1)2(0.281)+(2)2 (0.

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