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Ramjac Company wants to set up k independent

 April 14, 2018

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69. Ramjac Company wants to set up k independent file servers, each capable of running
the company’s intranet. Each server has average “uptime” of 98 percent. What must k be
to achieve 99.999 percent probability that the intranet will be “up”?
A. 1
B. 2
C. 3
D. 4
71. In a positively skewed distribution, the percentage of observations that fall below the
median is:
A. about 50 percent.
B. less than 50 percent.
C. more than 50 percent.
D. can’t tell without knowing n.
77. Which statement is true?
A. With nominal data we can find the mode.
B. Outliers distort the mean but not the standard deviation.
C. Business and economic data are rarely skewed to the right.
D. If we sample a normal population, the sample skewness coefficient is exactly 0.

100.The sum of the deviations around the mean is:
A. greater than zero if data are right-skewed.
B. smaller when the units are smaller (e.g., milligrams versus kilograms).
C. always zero.
D. dependent on the sample size.
116.Which variable is least likely to be regarded as ratio data?
A. Length of time required for a randomly chosen vehicle to cross a toll bridge
(minutes)
B. Weight of a randomly chosen student (pounds)
C. Number of fatalities in a randomly chosen traffic disaster (persons)
D. Student’s evaluation of a professor’s teaching (Likert scale)
118.A reporter for the campus paper asked five randomly chosen students how many
occupants, including the driver, ride to school in their cars. The responses were 1, 1, 1,
1, 6. The coefficient of variation is:
A. 25 percent.
B. 250 percent.
C. 112 percent.
D. 100 percent