2. Pony Express Delivery is a regional, overnight, freight service. It operates between Missouri and California. Customers can leave their parcels for shipping at Pony Express drop-off boxes/bins. Unfortunately, the boxes and bins are often the target of vandals. The losses range from cleaning up graffiti ($100) to having to replace a destroyed bin/box ($3,300). The recorded losses last year were:

NUMBER OF LOSSES: 8 5 3 1 1

LOSS SIZE ($): $100 $300 $700 $1,200 $3,000

a. What were the mean (average) and median dollar losses last year? (1.5 points)

b. What is the standard deviation of these historical losses? (note: use (n-1) in the denominator when calculating the variance) (2 points)