Statistics Worksheet With Answer Key Page 11
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20Find the variance for the given data. Round your answer
Find the mean of the data summarized in the given
to one more decimal place than the original data.
frequency distribution.
46) Compute the variance. The owner of a small
50) The heights of a group of professional
manufacturing plant employs six people. As
basketball players are summarized in the
part of their personnel file, she asked each one
frequency distribution below. Find the mean
to record to the nearest one-tenth of a mile the
height. Round your answer to one decimal
distance they travel one way from home to
place.
work. The six distances are listed below:
30 26 67 24 41 57
Height (in.) Frequency
A) 47.5
B) 56.9
70 - 71
2
C) 313.4
D) 300.1
72 - 73
4
74 - 75
12
76 - 77
9
Find the indicated measure.
78 - 79
10
47) The test scores of 32 students are listed below.
80 - 81
7
Find Q 3 .
82 - 83
1
32 37 41 44 46 48 53 55
A) 74.9 in.
B) 76.5 in.
56 57 59 63 65 66 68 69
C) 78.3 in.
D) 13.5 in.
70 71 74 74 75 77 78 79
80 82 83 86 89 92 95 99
Solve the problem.
A) 80
B) 79
51) The following is a set of data showing the
C) 79.5
D) 24
water temperature in a heated tub at different
time intervals. Use the range rule of thumb to
Solve the problem. Round results to the nearest
find the standard deviation. Round results to
hundredth.
the nearest tenth.
48) Scores on a test have a mean of 71 and a
115.2 114.4 116.6 115.0 113.7 114.0 112.9
standard deviation of 9. Michelle has a score
114.0
of 89. Convert Michelleʹs score to a z-score.
A) 1.2
B) 0.7
A) -18
B) 18
D) -56.0
C) 0.9
D) -2
C) 2
Find the indicated measure.
Find the variance for the given data. Round your answer
52) The test scores of 32 students are listed below.
to one more decimal place than the original data.
Find P 46 .
49) Compute the variance. Jeanne is currently
32 37 41 44 46 48 53 55
taking college zoology. The instructor often
56 57 59 63 65 66 68 69
gives quizzes. On the past five quizzes, Jeanne
70 71 74 74 75 77 78 79
got the following scores:
80 82 83 86 89 92 95 99
11 11 10 10 13
A) 15
B) 14.72
A) 1.2
B) 1.4
C) 67
D) 68
C) 1.5
D) 26.7
Determine which score corresponds to the higher relative
position.
53) Which score has the highest relative position: a
score of 36 on a test for which x = 26 and s =
10, a score of 5.6 on a test for which x = 4.6 and
s = 0.8 or a score of 468 on a test for which
x = 413 and s = 50?
A) A score of 468
B) A score of 5.6
C) A score of 36
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