4.1 Sampling and Surveys

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.

The high school administration is interested in average amount of homework per night. They choose 2 school buses at random and survey 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

The manager at Paneras surveys every tenth person leaving the restaurant. Only 12 out of the 40 people asked respond to the survey. This is an example of:

• Response bias

• Undercoverage

• Cluster sample

• Nonresponse

Your teacher asks each student individually how much they enjoy the class on a scale of 1 to 10. The results might not reflect students' actual feelings due to:

• Response bias

• Undercoverage

• Voluntary response bias

• Nonresponse

A company is interested in the effect of a new TV advertising campaign on sales. They contact all of their high-volume customers and ask if the advertisement caused them to make a new purchase. The main problem with this approach is due to

• Undercoverage

• Nonresponse

• Response bias

• Voluntary response

A school administrator is interested in how long it takes students to get to school in the 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

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.

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

the women at Texas A&M are numbered 1 to 21, 271. A computer generates 225 unique random numbers. The women are contacted and are asked their favorite school tradition. Which sampling design best describes the scenario.

• SRS

• Systematic Random Sample

• Stratified Random Sample

• Cluster Random Sample

Tags

CCSS.HSS.IC.B.3

A high school counselor sis near the cafeteria and asks students walking by if they wanted information on the taking the SAT. Which sampling design best describes the scenario

• Stratified Random Sample

• Cluster Random Sample

• SRS

• Convenience Sample

The principal of a high school makes an announcement that all students who are interested in planting more trees at the school, shgold swing by and tell the secretary when they would like to try and plant some trees. Which sampling design best describes the scenario

• Voluntary Response Sample

• Systematic Random Sample

• Cluster Sample

• SRS

Tags

CCSS.HSS.IC.B.3