Test PracticeT
Lesson 2A Measures of Variation 503- The number of games won by 10 chess
players is given.
13, 15, 2, 7, 5, 9, 11, 10, 12, 11Which of the following statements is
NOT supported by these data?
A. Half of the players won more than
10.5 games and half won less than
10.5 games.
B. The range of the data is 13 games.
C. There are no outliers.
D. One fourth of the players won more
than 7 games.- SHORT RESPONSE The ages in
months of dogs enrolled in obedience
class are: 8, 12, 20, 10, 6, 15, 12, 9, and 10.
Find the range, median, upper and
lower quartiles, and interquartile range
of the dogs’ ages.
17. The normal monthly rainfall in inches
for a city are given in the table.
What values, if any, are outliers?
Jan Feb Mar Apr May June
0.65 1.39 0.63 2.16 2.82 4.21
July Aug Sept Oct Nov Dec
3.22 1.20 9.31 11.25 0.70 0.80F. 9.31
G. 11.25
H. 9.31 and 11.25
I. There are no outliers.- Which of the following sets of data has
an interquartile range of 10?
A. 3, 4, 9, 16, 17, 24, 31
B. 41, 43, 49, 49, 50, 53, 55
C. 12, 14, 17, 19, 19, 20, 21
D. 55, 56, 56, 57, 58, 59, 62
Measures of Central Tendency
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AboutAbout
Data can be described by measures of central tendency. But sometimes using
one particular measure might misrepresent the data.BASKETBALL The table shows the number of points a basketball
team scored in their first five games. The team says that the
average number of points they score is 51 points. Explain how
this might be misleading.Mean _^38 +^39 +^40 5 +^43 +^95 = ^2555 = 51
Median 38, 39, 40, 43, 95
The measure of central tendency used by the team was the mean. This is
greater than most number of points scored because it includes the outlier,- So, it is misleading to use this measure.
- MARKETING An ice cream shop claims its average
menu price is $3. Use the data in the table and
explain how this might be misleading.
Kid’s
ConeSingle
ConeDouble
ConeTriple
ConeDeluxe
Sundae
$1.00 $2.75 $3.25 $3.75 $4.25Game Number of Points
138
240
395
439
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