Unit Test

Question 1

A cable company wants to find out the average number of hours its customers spend watching cable television. Which group would best represent a sample of the population?

Revolt · Accepted Answer

100 of the company's customers chosen from the monthly billing list

Question 2

Mia asked 20 random students at her school how many hours they spend on the computer each day.

Revolt · Accepted Answer

survey

Question 3

Beatriz recorded the number of customers entering a store for each hour interval.

Revolt · Accepted Answer

observational study

Question 4

A dentist wants to find out how often her patients floss their teeth. Which samples are biased? Check all that apply.all her patientspatients with no cavitiespatients younger than 18every 20th patientevery patient with braces

Revolt · Accepted Answer

patients with no cavities; patients younger than 18; every patient with braces

Question 5

Which statement is correct about the time Mr. Lopez’s students spent studying for the final exam?

Revolt · Accepted Answer

Most students spent an hour or less studying for the exam.

Question 6

Daniel used the Internet to research the number of tornados reported in the United States each year for the past 10 years.

Revolt · Accepted Answer

published data

Question 7

Which statements are correct about the two-way frequency table? Check all that apply.

Revolt · Accepted Answer

The table displays qualitative data.; Two teachers do not wear glasses.; A total of 6 teachers were polled.

Question 8

The dot plot shows that Amelie swam 3 laps times.

Revolt · Accepted Answer

2

Question 9

Amelie most frequently swam laps.

Revolt · Accepted Answer

5

Question 10

The data distribution is .

Revolt · Accepted Answer

skewed right

Unit Test Answers

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