Transcript T3 - Concept Check

Topic 3 Concept Check
The Bureau of Labor Statistics announces that last month it
interviewed all members of the labor force in a sample of 60,000
households; 4.9% of the people interviewed were unemployed.
4.9% in this scenario is a…?
a.
b.
c.
d.
Population
Parameter
Statistic
Sample
25%
25%
25%
25%
Table
a.
b.
c.
d.
A study of voting chose 663 registered voters at random shortly
after an election. Of these, 72% said they had voted in the
election. Election records show that only 56% of registered
voters voted in the election. 56% in this scenario is a … ?
a.
b.
c.
d.
Population
Parameter
Statistic
Sample
25%
25%
25%
25%
Table
a.
b.
c.
d.
You have data for many families on the parents’ income
and the years of education their eldest child completes.
What is the explanatory variable?
a.
b.
c.
d.
Parents’ income
Years of education
Age of eldest child
Number of children
in family
25%
25%
25%
25%
Table
a.
b.
c.
d.
A study of cell phones and the risk of brain cancer looked at a group of 469
people who have brain cancer. The investigators matched each cancer patient
with a person of the same sex, age, and race who did not have brain cancer,
then asked about use of cell phones. Is this an observational study?
a. Yes
b. No
c. Depends on results
33%
33%
33%
Table
a.
b.
c.
A study of cell phones and the risk of brain cancer looked at a group of 469
people who have brain cancer. The investigators matched each cancer
patient with a person of the same sex, age, and race who did not have brain
cancer, then asked about cell phone use. What is the explanatory variable?
20%
20%
20%
20%
20%
a. Brain cancer
presence
b. Age
c. Race
d. Gender
e. Cell phone usage
Table
a.
b.
c.
d.
e.
A study of cell phone usage and the risk of brain cancer looked at a group of
469 people who have brain cancer. The investigators matched each cancer
patient with a person of the same sex, age, and race who did not have brain
cancer, then asked about use of cell phones. What is the response variable?
20%
20%
20%
20%
20%
a. Brain cancer
presence
b. Age
c. Race
d. Gender
e. Cell phone usage
Table
a.
b.
c.
d.
e.