Page 198 - Math Course 3 (Book 2)
P. 198
Sampling and Bias
Your Turn!
Identify Sample as Biased or Unbiased Identify the Sample
Identify each sample as biased or unbiased. Ex- A large company wants to make sure that all
plain your reasoning. A local news station inter- of their employees are working their scheduled
views one person on every street in Los Angeles hours. The accountant states that the first 50
to give their opinion on their mayor. people to voluntarily submit their time cards will
be reviewed for accuracy. Identify the sample.
A. unbiased
B. biased A. all workers
C. cannot be determined B. 50 of the workers
C. entire population
D. half of the workers
Answer Answer
A statistics company calls every twentieth person Suggest a population from which the sample was
in Cleveland’s telephone directory to find out his or selected.
her favorite sports team in Ohio.
A. all of the workers
A. unbiased B. 50 of the workers
B. biased C. entire population
C. cannot be determined D. half of the workers
Answer Answer
Identify and Classify a Biased Samplet
Mark, a college journalist, wanted to find out what the average student in the United States does on the
weekend. He decides to interview people in his dorm. Identify the sample, and suggest a population from
which it was selected.
A. The sample is all college students. The population is college students in his dorm.
B. The sample is a college student. The population is all college students.
C. The sample is college students in his dorm. The population is all college students.
D. The sample is Mark. The population is college students in his dorm.
Answer
Classify the sample as a convenience sample, or a voluntary response sample.
A. convenience sample
B. voluntary response sample
C. none of the above
Answer
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