A simple random sample of 100 households located in a city recorded the number of people...

A simple random sample of 100 households located in a city recorded the number of people living in the household, X, and the weekly expenditure for food, Y . It is known that there are 100,000 households in the city. In the sample

Neglect the finite population correction in answering the following.

a. Estimate the ratio r = μ_y/μ_x .

b. Form an approximate 95% confidence interval for μ_y/μ_x .

c. Using only the data on Y estimate the total weekly food expenditure, τ , for households in the city and form a 90% confidence interval.