Unit 1 sample multiple choice questions

A description of different houses on the market includes the ,b~dowmg three variables.
Which of the variables is quantitative?
A) The square footage of the house C) The monthly electric bill
B) The monthly gas bi!I D) All of the above,
A survey typically records many"ganables of mtarast to the researchers involved. Below
are some of the variables from a survey conducted by the U.S. Postal Service. Which of
the variables is categqrical?
A) County of residence
B) Number of people, both aduks and children, living in the-household
C) Total household income, before taxes, ha 1993
D) Age of respondent
Ira histogram has a bar that is taller than the others then
A) the bar corresponds to the class interval containing the most o.bservations.
B) this is s ggestlve of a skewed distribution.
C) the class intervai for this bar should be shortened for the sake of symmetry.
D) All of the above.
Use the ±bllowing to answer questions ~-~
Consumers Union measured the gas mileage in miles per gallon of 38 1978-1979 model
automobiles on a special test track. The pie chart above provides information about th~
country of manufanture of the model cars used by Consumers Uzfi.om
Based on the pie chart above, we may conclude that
A) Japanese cars get significantly lower gas rnileage than cars of other countries. This is
because their slice of the pie is at the bottom of the chart.
B) more than half of the ears ha the study were from the United StatEs.
c) Swedish ears get gas mileages that are between those of Japanese and U.S, ears.
D) Mercedes Benz, Audi, Porsche, and BMW represent appro,~;~, atety a quarter of the
cars tested.

A reporter wishes to portray-basebal! players as overpaid. V~’rfi.c~h - measure of center
should he report as the average salary of major league players?
A) the mean.
B) the median.
C) either the mean or median. It doesn~ matter since they wil! be equal.
D) neither the mean nor median. Both will be much lower than the acvaal average salary.
Use the following to answer questions
A sample was taken of the salaries of 20 employees of a large company. The following boxplot
shows the salaries (in thousands of dollars) for this year.
Based on.this boxplot, which of the following statements is true7
A) The maximum salary is between 60 and 70 thousand dollars.
B) The minimum salary is 20 thousand dollars.
C) The range of the middle half of the salaries is about 20 thousand dollars.
D) The median salary is about 40 thousand dollars,
Based on this boxplot, which oft~e following statements is true?
A) The salary distribution is fairly symmetric.
B) About 10 employees make over $50,000.
C) Nobody makes over $80,000.
D) All of the above.
~’t
~aseu on Lms boxptot, Llae hw llUfnDer su~IInary iS
A) 2g, 39, 48, 60.5, 77. C) 28, 39, 51, 58, 77.
B) 28, 41, 48, 58, 77. D) 28, 41, 51, 60.5, 77.
A set of data is found to have a sample standard deviation of 25. Suppose 9 were added to
each of the numbers in the data. The standard deviation of the resulting data
A) would still be 25. C) would now be 28.
B) would now be 34. D) cannot be determined.

Yor a Phys~s course containing IO students, the maximum point total for the quar~" was 200.
The point totals for the ~.0 students are given in the st~raplot below.
I~37
t426
17 9
This stemplot is most similar to
A) a ldstograra with class intervals 110 _< score < 120, 120 _< scor.e < 130, etc.
B) a time plot of the da ~ "- w~th .... the observatmns taken m increasing order.
C) a boxplot of the data.
D) reporting th~ 5 point sunmnary for the-data, with the mean.
To which of the following data sets does this stemplot correspond?
A) All integers between 116 and 179
B) 1, 2, 3, 4, 6, 6, 7, 8, 8, 9 .
C) 16, 18, 21, 24, 28, 33, 37,.42, 46, 79
D)- 116, 118, 121,124, 128, 133, 137, 142, 146, !79 ¯
[~, The median point total for this class is
, ) 1~0._ C) D) IS7.
A consumer group surveyed the prices for a certain item in five di~erent stores, and
reported the average price as. $t5. We xdsited four of the five stores, and found the prices
to be $10, $15, 815, and $25. Assturdng that the consumer group is correct, what is the
price of-the item-at-the store that we did not visit~
A) $10 B) $~5 ~ C) $20 D) $25 ’
A set zf data~ a-mean that is much larger than the median. Which of the following
statements is most Consistent with th~s information?
A) A h~stogram of~he data is syrametrio.
B) A histogram of’the data is.skewed left.
C) A histogram of the data is’ skewed fight
D) The data set probably has a few lbw ou~ers.
The mean age of four people in a room is 30 years, A new person whose age is 55 years
enters the room. The mean age of the five people now in the room is
A) 30. B) 35. C) 40..D) Cannot be determined from the lnformation given~