Chapter Study Guide and Review 547Multi-Part Lesson Review
Measures of Central Tendency
Measures of Central Tendency (Lesson 1B)
Find the mean, median, and mode for each
data set. Round to the nearest tenth if
necessary.- number of siblings: 2, 3, 1, 3, 4, 3, 8, 0, 2
- 89°, 46°, 93°, 100°, 72°, 86°, 74°
- MONEY Which measure of central
tendency best represents the amount of
money students spent on clothing?
$21, $75, $48, $52, $65
EXAMPLE 1 Karrie’s science fair plants
measured 5 inches, 4 inches, 2 inches, 2
inches, and 7 inches. Find the mean,
median, and mode of the plant heights.Mean _^5 +^4 +^25 + 2 +^7 = ^205 or 4
Median 2, 2, 4, 5, 7
Mode 2Lesson 1Measures of Variation
Measures of Variation (Lesson 2A)
Find the measures of variation and any
outliers for each data set.- number of miles ran each week: 14, 5, 4,
3, 5, 5, 6, 5, 4, 6, 3 - number of hours spent burning music
CDs each week: 2, 3, 2, 4, 1, 4, 1, 2 - BOWLING The number of times Brittany’s
friends have been bowling is 6, 3, 7, 2, 5,
6, 1, and 8. Use the measures of variation
to describe this data.
EXAMPLE 2 The number of hours Jake
spent practicing for a band competition are
11, 9, 3, 9, 4, 9, 5, 5, 6, 10, and 9. Find the
measures of variation.
Range 11 - 3 or 8
Median 3, 4, 5, 5, 6, 9, 9, 9, 9, 10, 11
Lower Quartile 3, 4, 5, 5, 6
Upper Quartile 9, 9, 9, 10, 11
Interquartile Range 9 - 5 or 4Box-and-Whisker Plots (Lesson 2B)
Construct a box-and-whisker plot for the
set of data.- number of fish caught: 0, 3, 4, 8, 9, 9, 9,
11, 13 - POSTERS The number of posters various
students have in their rooms is 3, 2, 1, 0,
2, 3, 4, 2, 5, 0, and 2. Construct a box-and-
whisker plot for the data. What do the
lengths of the parts of the plot tell you?
EXAMPLE 3 The lengths of various train
rides are 4, 1, 2, 3, 6, 2, 3, 2, 5, 8, and 4 hours.
Draw a box-and-whisker plot for the
data set.0123456789Length of Train Rides (hr)Lesson 2546_550_C09_SGR_895130.indd 547 1/11/10 9:47 AM