Section 12.4 Skills Practice

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```NAME
DATE
12-4
PERIOD
Skills Practice
Comparing Sets of Data
Find the mean, median, mode, range, and standard deviation of each data set that
is obtained after adding the given constant to each value.
1. 98, 95, 97, 89, 88, 95, 90, 81, 87, 95; + 2
2. 57, 38, 42, 51, 39, 44, 33, 55; + (−7)
3. 112, 91, 108, 129, 80, 99, 78, 80; + (−15)
4. 5, 12, 7, 3, 8, 5, 7, 1, 4, 7, 3, 9; + 22
Find the mean, median, mode, range, and standard deviation of each data set that
is obtained after multiplying each value by the given constant.
5. 71, 72, 68, 70, 72, 67, 68, 72, 65, 70; × 0.2
6. 14, 17, 13, 9, 15, 7, 12, 16, 8, 9; × 5
7. 32, 30, 27, 29, 25, 33, 38, 26, 23, 31; × 1.6
8. 55, 50, 58, 52, 56, 57, 50, 55, 50; × 2
Florida Marlins
Chicago Cubs
64, 51, 67, 80, 92, 54, 64, 79, 76, 79, 91,
83, 83, 78, 71, 84, 87
84, 49, 73, 76, 68, 90, 67, 65, 88, 67, 88,
89, 79, 66, 85, 97, 83
a. Use a graphing calculator to construct a
box-and-whisker plot for each set of data. Then
describe the shape of each distribution.
Lesson 12-4