AnswersAlgebra D E-Learning Fall 2023 and beyondDescribing Data

Describing Data Answers

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1
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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.
2
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A cell phone company wants to determine the average amount of data that their smart phone customers use each month. Which group would best represent a sample of the population?

A
one thousand of their customers with the most expensive monthly plans
B
one thousand of their customers who most recently signed up with the company
C
one thousand of their customers with a current smart phone data plan
D
one thousand of their customers who called in for technical support
3

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.
4

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
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

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.

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