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Opinion polls. Pollsters regularly conduct opinion polls
Chapter , Problem 17E(choose chapter or problem)
Problem 17E
Opinion polls. Pollsters regularly conduct opinion polls to determine the popularity rating of the current president. Suppose a poll is to be conducted tomorrow in which 2,000 individuals will be asked whether the president is doing a good or bad job. The 2,000 individuals will be selected by random-digit telephone dialing and asked the question over the phone.
a. What is the relevant population?
b. What is the variable of interest? Is it quantitative or qualitative?
c. What is the sample?
d. What is the inference of interest to the pollster?
e. What method of data collection is employed?
f. How likely is the sample to be representative?
Questions & Answers
QUESTION:
Problem 17E
Opinion polls. Pollsters regularly conduct opinion polls to determine the popularity rating of the current president. Suppose a poll is to be conducted tomorrow in which 2,000 individuals will be asked whether the president is doing a good or bad job. The 2,000 individuals will be selected by random-digit telephone dialing and asked the question over the phone.
a. What is the relevant population?
b. What is the variable of interest? Is it quantitative or qualitative?
c. What is the sample?
d. What is the inference of interest to the pollster?
e. What method of data collection is employed?
f. How likely is the sample to be representative?
ANSWER:
Solution :
Step 1 of 6:
Given a poll is to be conducted tomorrow in which 2000 individuals will be asked whether the president is doing a good job or bad job.
Our gal is:
a). We need to find what is the relevant population.
b). We need to find the variable of interest and is it quantitative or qualitative.
c). We need to find the sample.
d). We need to find the inference of interest to the pollster.
e). We need to find what method of data collection is employed.
f). We need to find how likely to be representative.
a).
Now we have to find what is the relevant population.
The relevant population is all individual in the U.S.