The survey asked respondents to report the number of persons in the household who are related to the respondent and who earned any money from any job or employment (EARNRS). a. Estimate the mean...

The survey asked respondents to report the number of persons in the household who are related to the respondent and who earned any money from any job or employment (EARNRS). a. Estimate the mean number of earners per household in the United States. b. What is the required condition for your answer to part (a)? c. Is the required condition satisfied? Explain.