What is the mean of the data set?

14, 19, 18, 12, 22, 15, 16, 16, 14, 14, 21, 20

15.75

16.00

16.75

19.50

A town's yearly snowfall in inches over a 10-year period is recorded in this table.

What is the mean of the snowfall amounts?

15.0 in.

17.0 in.

17.9 in.

18.9 in
Year Snowfall in inches
1997 15
1998 11
1999 18
2000 25
2001 13
2002 20
2003 16
2004 28
2005 15
2006 18

Item 3

Kathleen made 29, 38, 45, 42, and 36 points on her assignments.

What is the mean number of points Kathleen made?

16

36

38

45

Item 4
What is the mean of the values in the stem-and-leaf plot?

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Key: 2|5 means 25

A stem-and-leaf plot with a stem value of 1 with a leaf value of 2, 3, 5, a stem value of 2 with a leaf value of 8 and 8, a stem value of 3 with a leaf value of 0, and a stem value of 4 with a leaf value of 2.

What is the mean of the values in the dot plot?

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A number line ranging from 40 to 50 with one dot over 40, two dots over 41, one dot over 45, two dots over 48, three dots over 49, and one dot over 50.