To survey the opinions of baseball bleacher fans at Wrigley Field, a surveyor pl
ID: 3252262 • Letter: T
Question
To survey the opinions of baseball bleacher fans at Wrigley Field, a surveyor plans to select every one-hundredth fan who enters the bleachers one afternoon. Will this result in a simple random sample of fans who sit in the stadium's bleachers? A. Yes, because each bleacher fan has the same chance of being selected. B. Yes, but only if there is a single entrance to the bleachers. C. Yes, because the 99 out of 100 bleacher fans who are not selected will form a control group. D. Yes, because this is an example of systematic sampling, which is a special case of simple random sampling. E. No, because not every sample of the intended size has an equal chance of being selected. Read the following sampling design scenarios. What fault do they all have in common? I. The Wall Street Journal plans to make a prediction for a presidential election based on a survey of its readers. II. A radio talk show asks people to phone in their views on whether the United States should pay off its huge debt to the United Nations. III. A police detective, interested in determining the extent of drug use by teenagers, randomly selects a sample of high school students and interviews each one about any illegal drug use by the student during the past year. A. All of the designs exhibit improper use of stratification. B. All of the designs have errors that can lead to strong bias. C. All of the designs confuse association with cause and effect. D. None of the designs satisfactorily control for sampling error. E. None of the designs make use of chance in selecting a sample.Explanation / Answer
12)
ANSWER:
E. No, beacuse not every sample of the intended size has an equal chance of being selected.
Explanation: Correct beacuse this is the definition of simple random sample.
13)
I : The Wall Street Journal plans to make a prediction for a presidential election based on a survey of its readers
Explaination: This has voluntary response bias, so only the readers with strong opinions will care enough to respond.
A radio talk show asks people to phone in their views on whether the United States should pay off its huge debt to the United Nations. Same as the first – voluntary response bias
III. A police detective, interested in determining the extent of drug use by teenagers, randomly selects a sample of high school students and interviews each one about any illegal drug use by the student during the past year.
Explaination: This is a great example of response bias beacuse no students (or at least no intelligent students) will admit to a cop face to face that they use illegal drugs. So the student will more than likely respond they don’t do drugs because that’s the response that will make them look better in the eyes of the cop.
ANSWER:
(B) All the designs have errors that can lead to strong bias.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.