Recall the probability distribution for family household size given in Exercise 11.4.8. 

a. What was the mean family household size in the United States in 2016? 

b. What was the standard deviation for family household size in the United States in 2016?

Data from Exercise 11.4.8.

According to the U.S. Census Bureau, the following table gives the probability distribution that a randomly chosen family household in the United States in 2016 has X members. A family household is one in which two people or more in the household are related. 

Transcribed Image Text:

x 2 p(x) 0.4390 3 0.2235 4 5 0.1936 0.0906 6 0.0341 7 0.0192