Question 1
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During a cold winter, the temperature stayed below zero for ten days
(ranging from 20 to 5). The variance of the temperatures of the ten day
period
can be either negative or positive
can not be computed since all the numbers are negative
must be at least zero
is negative since all the numbers are negative
Question 2
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The variance of a sample of 81 observations equals 64. The standard
deviation of the sample equals
4096
8
6,561
0
Question 3
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Exhibit 34
The following is the frequency distribution for the speeds of a sample of
automobiles traveling on an interstate highway.
Speed (MPH)
Frequency
50

54
2
55

59
4
60

64
5
65

69
10
70

74
9
75

79
5
35
Refer to Exhibit 34. The mean is
35
67
670
10
Question 4
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Exhibit 34
The following is the frequency distribution for the speeds of a sample of
automobiles traveling on an interstate highway.
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Speed (MPH)
Frequency
50

54
2
55

59
4
60

64
5
65

69
10
70

74
9
75

79
5
35
Refer to Exhibit 34. The variance is
6.969
48.570
50.000
7.071
Question 5
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Exhibit 34
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 Spring '10
 dail
 Standard Deviation, Quartile, researcher, following sample data

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