Question: A realtor in Mission Viejo, California, wants to estimate the average price of a house in the city.
a. Open the Mission Viejo (raw) data from the text website into an Excel spreadsheet (data are in $1,000s). Assume the population standard deviation is $100 (in $1,000s).
b. Construct a 90% and a 99% confidence interval for the average house price. Comment on the corresponding widths of the intervals.