WorksheetsAP Statistics Sampling Types and Bias
Total questions: 15
Worksheet time: 15mins
A group of librarians is interested in the numbers of books and other media that patrons check out from their library. They examine the checkout records of 150 randomly selected adult patrons.
The population is all adult patrons of the library; the sample is the 150.
The populations is all patrons of the library; the sample is the adult patrons of the library.
The population is all patrons is all patrons who check out at least 1 book from the library; the sample is the 150 patrons selected.
If you have 1,000 schools on the list, number them from 000 to 999 and read the table three digits at a time. What are the first five schools in this sample?
24, 19, 83, 72, 41
241, 983, 724, 152, 579
2419, 8372, 4152, 5761, 0849
Identify the Sample: A restaurant wants to know if customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The restaurant concluded that most customers do not order dessert.
20 customers
8 customers
All customers
Dessert
Identify the type of sampling used:
Interview every 10th student who enters the school in the morning.
simple random sample
voluntary response sample
systematic sample
convenience sample
Identify the type of sampling used:
Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected.
systematic sample
simple random sample
convenience sample
voluntary response sample
Identify the type of sampling used:
Marianne wanted to know students' opinion on the new schedule at school. She survey's the first 30 students who come into her class.
Convenience Sampling
Systematic Random Sampling
Simple Random Sampling
Volunteer response
Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.
This is a form of:
Simple Random Sample
Stratified Random Sample
Voluntary Response
Systematic Random Sampling
An independent research company wants to go door to door to survey people in the city of West Palm Beach. The company decides to number all blocks within the city limits, randomly choose 1 block, and then survey all households on that block.
This is an example of:
Simple Random Sample
Stratified Random Sample
Cluster Random Sample
Systematic Random Sampling
Identify the type of sampling used:
A teacher splits her classes up by period. She then uses a RNG to select 10 students from each period to participate in a survey.
Stratified Random Sample
Systematic Random Sample
Cluster Random Sample
Biased Sample
Why do we randomly select our samples?
for control
reduce bias
so we don't get the same answers from everyone
to eliminate confounding results
Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond
Response Bias
Undercoverage
Convenience Sampling
Voluntary Response
An SRS of 25 students is taken from each grade to form the sample. This is what type of sampling design?
Cluster
SRS
Stratified
Multistage
I want to estimate the proportion of people in North Palm Beach who own cats. I stand outside a NPB pet store and ask every 4th person whether they own a cat or not. What is the most prominent kind of bias evident?
Undercoverage
Response
Non-Response
Voluntary Response
16 out of the 20 people who called into a radio station said that they enjoy the station's morning programming. What type of bias is demonstrated here?
Voluntary Response Bias
Nonresponse Bias
Undercoverage Bias
An employer wants to know how their 500 employees like working for them. Which is the most representative sample?
Ask the first 75 people to show up for work
Randomly select the names of 10 employees
Poll the Employees of the Month for the past year
Randomly select the names of 75 employees
