10. The hourly wages (in dollars) of seven employees in a small company are as follows:

18 16 20 12 14 12 10

Find the (a) mode (b) median (c) mean.

11. A group of eleven high school students was surveyed about its use of various drugs,

including alcohol. Asked how frequently they had engaged in binge drinking during the

previous six months, the students responded as follows:

4 2 0 2 1 3 0 1 7 5 3

a. Calculate the median

b. Calculate the mean

12. The following represent age at first marriage of a sample of 25 adults:

18 18 19 19 19 19 20 20 20 21 21 22 22

23 23 24 25 26 26 26 27 27 29 30 31

Calculate a) the variance and b) the standard deviation.

13.A local city is considering building a new train to alleviate the heavy traffic on its highways. To find out how many people would make use of this new train, a government worker went out and interviewed a sample of commuters. Below are the number of miles driven each week by 10 people who said that they would use the train instead of driving to work. Calculate the range, variance and standard deviation.

150 750 300 425 175 600 450 250 900 275