Compare your household size to the standard family size as reported in the 2000 census. According to that data, the average household size had a mean of 3.14 and standard deviation of 1.12. What is the probability that there is a household size that is greater than yours, what is the probability that there is a household size less than yours? How can this information be of use?
The probability determining the sizes of a household based on a mean and standard deviation is calculated.