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AP Statistics with 6 Practice Tests

Martin Sternstein

Chapter 1

Exploring One-Variable Data - all with Video Answers

Educators


Section 1

Quiz 1

01:31

Problem 1

The times, in minutes, taken by 155 high school students to complete a level of the video game Angry Birds are summarized in the histogram below.
(A) The minimum time taken by any of these students was 5 minutes.
(B) The maximum time taken by any of these students was 35 minutes.
(C) If the times are arranged in order, the middle time would be between 10 and 15 minutes.
(D) If the times are arranged in order, the middle time would be between 15 and 20 minutes.
(E) The same number of students took less than 15 minutes as took over 20 minutes.

Nick Johnson
Nick Johnson
Numerade Educator
01:24

Problem 2

Which of the following is a true statement?
(A) Stemplots are useful for both quantitative and categorical data sets.
(B) Stemplots are equally useful for small and very large data sets.
(C) Stemplots can show symmetry, gaps, clusters, and outliers.
(D) Stemplots may or may not show individual values.
(E) Stems may be skipped if there is no data value for a particular stem.

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator
01:20

Problem 3

Refer to the following five histograms:
To which of the above five histograms does the following cumulative relative frequency plot correspond?
(A) $A$
(B) $\underline{B}$
(C) $\mathrm{C}$
(D) $\mathrm{D}$
(E) $\mathrm{E}$

Sneha Ravi
Sneha Ravi
Numerade Educator
01:09

Problem 4

Refer to the following five histograms:
To which of the above five histograms does the following cumulative relative frequency plot correspond?
(A) $\mathrm{A}$
(B) $\mathrm{B}$
(C) $\mathrm{C}$
(D) $\mathrm{D}$
(E) $\mathrm{E}$

Sneha Ravi
Sneha Ravi
Numerade Educator
01:07

Problem 5

Refer to the following five histograms:
To which of the above five histograms does the following cumulative relative frequency plot correspond?
(A) $A$
(B) $\mathrm{B}$
(C) $\mathrm{C}$
(D) $\mathrm{D}$
(E) $\mathrm{E}$

Sneha Ravi
Sneha Ravi
Numerade Educator
01:23

Problem 6

Allan famously quipped that when he moved from Pennsylvania to California, the average IQ dropped in both states. What would have had to been true for this to happen?
(A) Allan's IQ was greater than the average IQ in both Pennsylvania and California.
(B) Allan's IQ was greater than the average IQ in Pennsylvania and less than the average IQ in California.
(C) Allan's IQ was less than the average IQ in Pennsylvania and greater than the average IQ in California.
(D) Allan's IQ was less than the average IQ in both Pennsylvania and California.
(E) There is no way for Allan's statement to be true.

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator
02:04

Problem 7

A car manufacturer claims that the cars it sells have an average fuel efficiency of $35 \mathrm{mpg}$. A consumer group believes that the true figure is lower. The consumer group obtains a random sample of 5 of the company's cars and determines an average of $32 \mathrm{mpg}$. In response to the consumer group's findings, the company runs a simulation by randomly picking 5 cars 160 times from a fleet of cars of known $35 \mathrm{mpg}$ efficiency and calculating the resulting averages to show that 32 mpg was possible. The company makes the following dotplot. Does the company's argument seem reasonable given this dotplot?
(A) Yes, because the dotplot shows that anything is possible in the real world.
(B) Yes, because the dotplot shows that the average was not 35 for every 5 -car set that the company randomly picked..
(C) Yes, because the dotplot shows that $32 \mathrm{mpg}$ is a possible average of 5 cars from a fleet of cars of known $35 \mathrm{mpg}$ efficiency.
(D) No, because the dotplot shows that anything is possible in the real world.
(E) No, because the possibility of picking 5 cars with an average of $32 \mathrm{mpg}$ or lower from a fleet of cars of known 35 mpg efficiency is very small, only 4 out of 160 , or
$0.025 .$

Jerrah Biggerstaff
Jerrah Biggerstaff
Numerade Educator