Question: Choose a random sample of 10 states from .xls file attached:

a. Estimate total ownership rate for each year. How do the estimates compare to actual totals?

b. Repeat sample 10 times and find an 80% confidence intervals using the samples? How many contain the true population percentage?

c. Use sample from a. to find a 95% confidence interval for the difference in the proportion from 1990 to 2003?