AnswersCR27 ALG 1-1200310-S2-Degele-VOL7006PDescribing Data

Describing Data Answers

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Irina’s basketball team has a 1 in 6 chance of winning the first-place trophy. She rolled a six-sided number cube repeatedly, assigning her team a number from 1 to 6 to demonstrate the probability that her team would win.

A
survey
B
simulation
C
experiment
D
observational study
2
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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.
3

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.
4

Which sample fairly represents the population? Select two options.measuring the height of every fiftieth person on the school roster to determine the average height of the boys in the schoolcalling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignmentobserving every person walking down Main Street at 5 p.m. one evening to determine the percentage of people who wear glassessending a confidential e-mail survey to every one-hundredth parent in the school district to determine the overall satisfaction of the residents of the towntaking 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

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
5

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.
6

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
7

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.
8

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
9

Staff from the school newspaper is taking a poll to find out how students in the school are going to vote in the upcoming election for class president. Which group would best represent a sample population?

A
Every tenth student staying after school.
B
Every tenth student in the library at lunch.
C
Every tenth student in the main hallway between class.
D
Every tenth student in the student section at the school football game.
10

An Internet and cable-television supplier surveyed a random sample of their customers. The results 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 Internet customers who are not satisfied than cable television customers who are not satisfied.
C
About half of the customers surveyed are cable-television customers.
D
About one-fourth of the cable-television customers are not satisfied.

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