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84 UNIT 1 Exploring One-Variable Data

UNIT 1, PART I AP® STATISTICS PRACTICE TEST

Section I: Multiple Choice Select the best answer for each question.

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T1 An airline records data on several variables for each of (A) 45. (D) 32.
its flights: model of plane, amount of fuel used, time (B) 44. (E) 23.
in flight, number of passengers, and whether the flight (C) 43.
arrived on time. The number and type of variables
recorded are Questions T4–T6 refer to the following setting. Realtors col-
(A) 1 categorical, 4 quantitative (1 discrete, lect data so that they can serve their clients more effectively.
3 continuous). In a recent week, data on the age of all homes sold in a par-
ticular area were collected and displayed in this histogram.
(B) 1 categorical, 4 quantitative (2 discrete,
2 continuous). 10
9
(C) 2 categorical, 3 quantitative (1 discrete, 8
2 continuous). 7
(D) 2 categorical, 3 quantitative (2 discrete, 6
1 continuous). Frequency 5 4
(E) 3 categorical, 2 quantitative (1 discrete, 3
1 continuous). 2
1
T2 The bar graph summarizes responses of dog own- 0
ers to the question, “Where in the car do you let 0 5 15 25 35 45 55 65 75
your dog ride?” Which of the following statements Age of home (years)
is true?
T4 Which of the following could be the median age?
(A) 19 years (D) 34 years
70
(B) 24 years (E) 39 years
60 (C) 29 years
Percent 50 T5 Which of the following is most likely true for this
40
30 distribution?

20 (A) mean > median, range < IQR

Back Front Floor Passenger’s Driver’s (B) mean < median, range < IQR
seat passenger lap lap

seat (C) mean > median, range > IQR
Where does the dog ride?

(D) mean < median, range > IQR
(E) mean = median, range > IQR

(A) A majority of owners do not allow their pets to
ride in the front passenger seat. T6 The standard deviation of the distribution of home
(B) About twice as many pets are allowed to sit in the age is about 16 years. Which of the following is a cor-
front passenger seat as in the passenger’s lap. rect interpretation of this value?
(C) The vertical axis scale should start at 0. (A) The age of all houses in the sample is within 16
(D) These data could also be presented in a pie chart. years of the mean age.
(E) The distribution of where the dog rides is skewed (B) The gap between the youngest and oldest house
to the right. is 16 years.
(C) The age of all the houses in the sample is 16 years
T3 Forty students took a statistics test worth 50 points. from the mean age.
The dotplot displays the data. The third quartile is
(D) The gap between the first quartile and the third
quartile is 16 years.
0 5 10 15 20 25 30 35 40 45 50 (E) The age of the houses in the sample typically var-
Test score ies by about 16 years from the mean age.

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