The data file agstrat.dat also contains information on other variables. For each of the following quantities, plot the data, and estimate the population mean for that variable along with its standard error and a 95% CI. Compare your answers with those from the SRS in Exercise 15 of Chapter 2.

i. Number of acres devoted to farms, 1987

ii. Number of farms, 1992

iii. Number of farms with 1000 acres or more, 1992

iv. Number of farms with 9 acres or fewer, 1992