Homework Clinic
Mathematics Clinic => Grade 11 and 12 Mathematics => Topic started by: moongchi on Jul 24, 2018
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A professor wanted to find out whether students enrolled in her statistics class would like her to increase her office hours. She plans to take a random sample of 20 students among those coming to class on the next lecture day. Explain what the difficulty with her method is.
Question 2
A short questionnaire is to be given to a sample of people. The questionnaire involves the topic of abortion. The woman who will hand out the questionnaire is a big pro-life supporter and on the day of the survey shows up with pamphlets and picket-signs expressing her opinion. What type of bias may this cause?
a. Selection bias
b. Response bias
c. Non-response bias
d. Volunteer bias
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Answer to Question 1
Her sampling frame is all students who came to that lecture. Since not all students come to every lecture, she used the wrong sampling frame.
Answer to Question 2
B