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

Find the

(a) mean,

(b) variance,

(c) standard deviation, and

(d) expected value of the probability distribution. 

Interpret the results.

Transcribed Image Text:

x 1 2 3 4 5 6 7 P(x) 0.281 0.340 0.154 0.129 0.060 0.022 0.013