Question Details

91. What is the mode?

A. 8

B. 9.6

C. 9.5

D. 10.5

E. 9

92. Find the coefficient of variation for an IQ test with a mean of 100 and a standard deviation of 15.

A. 15.0

B. 6.7

C. 0.15

D. 1.5

E. 67

93. Find the z-score for an IQ test score of 142 when the mean is 100 and the standard deviation is 15.

A. 42

B. 2.8

C. 18.78

D. 1.27

E. -2.8

94. Find the z-score for an IQ test score of 922 when the mean is 100 and the standard deviation is 15.

A. 0.53

B. 0.77

C. -0.77

D. -0.53

E. -8.00

95. Find the z-score for an IQ test score of 118 when the mean is 100 and the standard deviation is 15.

A. 1.2

B. 1.0

C. 18.0

D. -1.03

E. -1.2

96. Find the z-score for an IQ test score of 125 when the mean is 100 and the standard deviation is 15.

A. 25

B. 1.1

C. 1.67

D. -1.1

E. -1.67

97. Using Chebyshev's Rule, find the interval that contains at least 93.75% of all measurements when mean =

2.549 and s = 1.828.

A. [-2.935 8.033]

B. [-1.107 6.205]

C. [-26.699 31.797]

D. [2.435 2.663]

E. [-4.763 9.861]

Use the following to answer questions 98-100:

According to a survey of the top 10 employers in a major city, a worker spends an average of 413 minutes

a day on the job. Suppose the standard deviation is 26.8 minutes and the time spent is approximately a

normal distribution.

98. What are the times that approximately 68.26% of all workers will fall?

A. [394.8 431.2]

B. [386.2 439.8]

C. [372.8 453.2]

D. [359.4 466.6]

E. [332.6 493.4]

99. What are the times that approximately 95.44% of all workers will fall?

A. [387.5 438.5]

B. [386.2 439.8]

C. [372.8 453.2]

D. [359.4 466.6]

E. [332.6 493.4]

100.What are the times that approximately 99.73% of all workers will fall?

A. [305.8 520.2]

B. [386.2 439.8]

C. [372.8 453.2]

D. [359.4 466.6]

E. [332.6 493.4]

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