8. Statistics for the closing price of the USAA Aggressive Growth Fund for the year 2009 indicate that the average closing price was $23.90, with a standard deviation of

$3.00. Using the 68–95–99.7 Rule, draw and label an appropriate sampling model for the mean closing price of 36 days’ closing prices selected at random. What (if anything)

do you need to assume about the distribution of prices? Are those assumptions reasonable?