The number of vehicles passing through a bank drive-up line during each 15-minute period was
recorded. The results are shown below. Find the median number of vehicles going through the line
in a fifteen-minute period.
25 27 25 28
28 25 30 27
35 31 31 29
24 31 25 20
15 27 27 27
A) 26.85 vehicles B) 28 vehicles C) 27 vehicles D) 31 vehicles
Q. 2Dave is a college student contemplating a possible career option. One factor that will
influence his decision is the amount of money he is likely to make. He decides to look up
the average salary of graduates in that profession.
Which information would be more
useful to him, the mean salary or the median salary. Why?
Q. 3Listed below are the amounts of time (in months) that the employees of a restaurant have been
working at the restaurant. Find the mean.
1 5 6 8 11 14 17 46 61 90 99 126 143 167
A) 31.5 months B) 61.1 months C) 56.7 months D) 52.9 months
Q. 4The mean height of a basketball team is 6 feet with a standard deviation of 0.2 feet. The team's
center is 6.9 feet tall. Find the center's z score. Is his score unusual?
A) 4.95, yes B) 4.5, yes C) 3.83, no D) 4, no
Q. 5The probability that when 75 people are surveyed, at least five of them have the same
birth date. (Ignore leap years).
What will be an ideal response?
Q. 6Human body temperatures have a mean of 98.20 F and a standard deviation of 0.62. Sally's
temperature can be described by z = -1.5. What is her temperature? Round your answer to the
nearest hundredth.
A) 97.27F B) 99.13F C) 96.70F D) 95.79F
Q. 7The median of a data set is always/sometimes/never (select one) one of the data points in a
set of data. Explain your answer with brief examples.
What will be an ideal response?
Q. 8The table below provides a frequency distribution for the winner of the Davis Cup during
the period 1977-1994.
Winner of
Davis Cup Frequency
United States 6
Germany 3
Czechoslovakia 1
Australia 3
France 1
Sweden 4
Which measure of center, the mean, the median, or the mode is most appropriate here?
Why?
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