AnswersAlgebra D E-Learning Fall 2023 and beyondDescribing Data

Describing Data Answers

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A survey was taken of a random sampling of residents of New York City and Los Angeles to compare how many of them own a car.Which statement about the two-way frequency table is true?

Question illustration
A
The survey represents quantitative data.
B
There is a greater percentage of LA residents who own a car than NYC residents who do.
C
The total number of people in the poll who own a car is 4,120.
D
More people in the poll own a car than do not own a car.
2
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Which is an example of a survey involving quantitative data?

A
the favorite food of each person
B
the number of cavities each person has had
C
the color of the walls in each person’s bedroom
D
the type of car that each person owns
3

The ages of the people in attendance at the showing of an award-winning foreign film are shown below.

Question illustration
A
The data is symmetrical, showing that the majority of the attendees were between the ages of 30 and 50.
B
The data is symmetrical, showing that the majority of the attendees were between the ages of 21 and 60.
C
The data is skewed, showing that the majority of the attendees were between the ages of 30 and 50.
D
The data is skewed, showing that the majority of the attendees were between the ages of 21 and 60.
4

Janie asked all of her classmates about the number of pets they have in their household. Her findings are shown in the table.Which statement about the two-way frequency table is true?

Question illustration
A
The survey represents quantitative data.
B
There is a greater percentage of girls who do not own a pet than boys who do not own a pet.
C
The total number of girls who own 2 or more pets is 2.
D
More girls do not own a pet than do own a pet.
5

Sal recorded the number of crackers in each snack-sized package he opened.Which statement must be true according to the box plot?

Question illustration
A
The data is symmetric, and the lowest number of crackers in a package was 7.
B
The data is symmetric, and the lowest number of crackers in a package was 8.
C
The data is skewed, and the lowest number of crackers in a package was 7.
D
The data is skewed, and the lowest number of crackers in a package was 8.
6

Which sample fairly represents the population? Select two options.

A
measuring the height of every fiftieth person on the school roster to determine the average height of the boys in the school
B
calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment
C
observing every person walking down Main Street at 5 p.m. one evening to determine the percentage of people who wear glasses
D
sending a confidential e-mail survey to every one-hundredth parent in the school district to determine the overall satisfaction of the residents of the town
E
taking a poll in the lunch room (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch
7

Darren kept track of the number of e-mails he received from one of his customers each day for 14 days on the dot plot.Which statement must be true according to the dot plot?

Question illustration
A
The data is skewed left and shows that on half of the days, Darren received 11 or 12 e-mails from the customer.
B
The data is skewed left and shows that on half of the days, Darren received 7 to 9 e-mails from the customer.
C
The data is skewed right and shows that on half of the days, Darren received 11 or 12 e-mails from the customer.
D
The data is skewed right and shows that on half of the days, Darren received 7 to 9 e-mails from the customer.
8

A researcher wants information about rainfall patterns over the past 20 years. Instead of collecting new measurements, the researcher uses data from a government weather database.

A
It provides easy access to a large amount of existing data.
B
It guarantees that the data collected will be accurate.
C
It allows the researcher to control every measurement.
D
It collects new data faster than weather stations.
9

A poll is being taken on Wednesday to predict which movie will be the most popular at the city’s movie theaters the next weekend: an animated movie, an action movie, or a romantic comedy. Which group would best represent a sample population?

A
Every fifth person coming out of the high school.
B
Every fifth person in the mall’s food court at lunchtime.
C
Every fifth person coming out of the downtown grocery store at different times throughout the day.
D
Every fifth person walking down the street in several different locations throughout town at different times of day.
10

The amount of rainfall each month over the past four years is shown below.

Question illustration
A
The data is skewed, showing that the majority of the monthly rainfall amounts was between 2.01 and 4 inches.
B
The data is skewed, showing that the majority of the monthly rainfall amounts was less than 2.01 or greater than 4 inches.
C
The data is symmetrical, showing that the majority of the monthly rainfall amounts was between 2.01 and 4 inches.
D
The data is symmetrical, showing that the majority of the monthly rainfall amounts was less than 2.01 or greater than 4 inches.

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