Multiple Choice Identify the
choice that best completes the statement or answers the question.


1.

You measure the age, marital status and earned
income of an SRS of 1463 women. The number and type of variables you have measured
is
a.  1463; all
quantitative.  b.  four; two categorical and two quantitative.  c.  four; one categorical and three
quantitative.  d.  three; two categorical and one quantitative.  e.  three; one categorical and two
quantitative. 


2.

Consumers’ Union measured the gas mileage in
miles per gallon of 38 1978–1979 model automobiles on a special test track. The pie chart
below provides information about the country of manufacture of the model cars used by Consumers
Union. Based on the pie chart, we may conclude that:
a.  Japanese cars get significantly
lower gas mileage than cars of other countries. This is because their slice of the pie is at
the bottom of the chart.  b.  U.S cars get significantly higher gas mileage than cars from other
countries.  c.  Swedish cars get gas mileages that are between those of Japanese and U.S.
cars.  d.  Mercedes, Audi, Porsche, and BMW represent approximately a quarter of the cars
tested.  e.  More than half of the cars in the study were from the United States.



3.

“Normal” body temperature varies by
time of day. A series of readings was taken of the body temperature of a subject. The
mean reading was found to be 36.5° C with a standard deviation of 0.3° C (recall that
°F = °C(1.8) + 32). When converted to °F, the mean and standard deviation are:
a.  97.7,
32  b.  97.7,
0.30  c.  97.7, 0.54  d.  97.7, 0.97  e.  97.7, 1.80 


4.

Which of the following is likely to have a mean
that is smaller than the median?
a.  The salaries of all National Football League
players.  b.  The scores of students (out of 100 points) on a very
easy exam in which most get nearly perfect scores but a few do very
poorly.  c.  The prices of homes in a large
city.  d.  The scores of students (out of 100 points) on a very difficult exam in which
most get poor scores but a few do very well.  e.  Amounts awarded by civil court
juries. 


5.

The weights of the male and female students in a
class are summarized in the following boxplots:
Which of the
following is NOT correct?
a.  About 50% of the male students have weights between 150
and 185 pounds.  b.  About 25% of female students have weights more than 130
pounds.  c.  The median weight of male students is about 162
pounds.  d.  The mean weight of female students is about 120 pounds because of
symmetry.  e.  The male students have less variability than the female
students. 


6.

For the following histogram, what is the proper
ordering of the mean, median, and mode? Note that the graph is NOT numerically
precise–only the relative positions are important.
a.  I = mean, II = median, III =
mode  b.  I = mode, II = median, III = mean  c.  I = median, II = mean, III =
mode  d.  I = mode, II = mean, III = median  e.  I = mean, II = mode, III =
median 


7.

A medical researcher collects health data on many
women in each of several countries. One of the variables measured for each woman in the study
is her weight in pounds. The following list gives the fivenumber summary for the weights of
women in one of the countries.
Country
A: 100, 110, 120, 160, 200
About what percentage of Country A women weigh between
110 and 200 pounds?
a.  50%  b.  65%  c.  75%  d.  85%  e.  95% 


8.

The following bar graph gives
the percent of owners of three brands of trucks who are satisfied with their
truck.
From
this graph we may legitimately conclude that:
a.  Owners of other brands of trucks are
less satisfied than the owners of these three brands.  b.  Chevrolet owners are substantially more satisfied than
Ford or Toyota owners.  c.  There is very little difference in the satisfaction of owners for the three
brands.  d.  Chevrolet probably sells more trucks than Ford or
Toyota.  e.  A pie chart would have been a better choice for displaying this
data. 


9.

A sample of 99 distances has a mean of 24 feet and
a median of 24.5 feet. Unfortunately, it has just been discovered that an observation which was
erroneously recorded as “30” actually had a value of “35”. If we make
this correction to the data, then:
a.  The mean remains the same, but the
median is increased.  b.  The mean and median remain the same.  c.  The median remains the same, but the mean is
increased.  d.  The mean and median are both increased.  e.  We do not know how the mean and median are affected
without further calculations, but the variance is
increased. 


10.

The fivenumber summary for scores on a statistics
exam is 11, 35, 61, 70, 79. In all, 380 students took the test. About how many had scores
between 35 and 61?
a.  26  b.  76  c.  95  d.  190  e.  None of
these 
