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- 1. Multiple Choice
The high school administration is interested in the percent of HHS students that wear costumes to school on Halloween. They choose 2 school buses at random and check all students on each bus. What type of sample is this and why might it be biased?
Stratified random sample; biased because some buses are not surveyed.
Stratified random sample; biased because very few seniors ride the bus.
Cluster sample; biased because very few seniors ride the bus
Cluster sample; biased because some buses are not surveyed
- 2. Multiple Choice
Yelp allows all users to leave a restaurant review. What might be the issue with the feedback?
Voluntary Response: Customers who had a bad experience or more likely to leave a review.
Nonresponse: Customers might not respond.
Undercoverage: Not everyone has the chance to respond.
Convenience Sample: Only some people are surveyed.
- 3. Multiple Choice
The manager at Dunkin Donuts surveys every tenth person leaving the restaurant to get their reaction to the store's special Halloween treats. Only 12 out of the 40 people asked respond to the survey. This is an example of:
Response bias
Undercoverage
Cluster sample
Nonresponse
- 4. Multiple Choice
Your teacher asks each student individually how much they enjoy her evil witch costume on a scale of 1 to 10. The results might not reflect students' actual feelings due to:
Response bias
Undercoverage
Voluntary response bias
Nonresponse
- 5. Multiple Choice
McDoodals is interested in the effect of a new TV advertising campaign on sales of their Halloween Shake. They contact all of their high-volume customers and ask if the advertisement caused them to buy the Halloween Shake. The main problem with this approach is due to
Undercoverage
Nonresponse
Response bias
Voluntary response
- 6. Multiple Choice
A school administrator is interested in how long it takes students to get to school on Halloween morning. She asks the first 20 students to arrive at school how long it took them. The sampling method and problem with the approach is:
Convenience sample; students who arrive at school early may have a shorter trip
Voluntary sample; students don't have to answer the question
Simple Random Sample; Response bias - students are likely to lie
Simple Random Sample; Undercoverage - some students have no chance of being selected
- 7. Multiple Choice
A website offers a poll to all users, asking them how much they plan to exercise in the next month. 85% of the 5,000 respondents indicated they would exercise at least 10 times next month. Which of the following is most likely?
85% Americans will exercise at least 10 times next month
Because it is a convenience sample, the poll does not tell us much.
Because it is a voluntary sample, the poll does not tell us much.
There are not enough respondents to draw a conclusion.
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