11. Suppose that the following figures show the price of silver per ounce, in dollars, for a 10-business-day period.

19.5, 19.2, 19.3, 19.2, 19, 18.7, 18.7, 18.7, 19.1, 18.8

Find the sample mean, median, and mode(s). (Enter multiple modes as a comma-separated list, if necessary.)

mean :

median :

mode(s) :

What do your answers tell you about the price of silver?

Over the 10-business-day period sampled, the price of silver averaged $ ______ per ounce. It was above $ _____ as many times as it was below that price, and stood at $ _________

per ounce more often than at any other price.

10. Suppose the following is a sample of the day-by-day change, rounded to the nearest 100 points, in the Dow Jones Industrial Average during 10 successive business days around the start of a financial crisis.

100, 400, 200, 500, 200, 300, 200, 900, 100, 200

Compute the mean and median of the given sample.

mean:

median:

There were as many days with a change in the Dow above _____ points as there were with changes below that.