Use the probability distribution or histogram to find the (a) mean, (b) variance, (c) standard deviation, and (d) expected value of the probability distribution, and (e) interpret the results. The histogram shows the distribution of household sizes in country A for a 0.40 recent year. (a) The mean is 2.392. (Type an integer or a decimal. Do not round.) (b) The variance is (Round to two decimal places as needed.) AP(x) 0.325 0.298, 0.30 0.20- 0.155 0.151 0.10- 0.051 0.020 0.00- -2 3 5 6 Household Size