Question: A random sample of the commissions earned by local Tupperware dealers last month is given below.

$4377.47 $3183.76 $1970.16 $2270.88 $3860.06

$2508.55 $1569.64 $4205.30 $1663.68 $3960.71

a. Find x-bar and s for this data set. (5 points)

b. Construct a 99 percent confidence interval for the mean commission earned by local Tupperware dealers. You may assume the commissions are normally distributed. (5 points).