Quiz about Sampling and Bias vocab

Question 1

What is a sample?

Accepted Answer

group of people who represent a larger population

Answer

group of people with certain specific characteristics

Answer

sample that accurately reflects the characteristics of the population as a whole

Answer

All of the Above

Question 2

What is a representative sample?

Accepted Answer

sample that accurately reflects the characteristics of the population as a whole

Answer

group of people who represent a larger population

Answer

group of people with certain specific characteristics

Answer

All of the Above

Question 3

I want a representative sample of likely voters. I use a telephone directory to randomly select 200 people. What is the most apparent bias?

Accepted Answer

Undercoverage

Answer

Nonresponse

Answer

<p>Response</p>

Answer

Voluntary Response

Question 4

I want to estimate the average number of hours EHS students spend playing video games. I sample all of my students. What kind of sampling method is this?

Accepted Answer

Convenience Sample

Answer

Cluster sample

Answer

Stratified Sample

Answer

Simple Random Sample

Question 5

I want to estimate how many hours EHS students play video games daily. I get a list of all English classes and randomly select 6 English classes. I survey all the students in those 6 classes. What kind of sampling method is this?

Accepted Answer

Cluster Sample

Answer

Simple Random Sample

Answer

Systematic Sample

Answer

Stratified Sample

Question 6

I want to estimate the proportion of all adults in Chula Vista who graduated from high school. I select a random sample of addresses and go to those houses. When an adult answers the door, I ask if they had graduated from high school. If a child answers the door, I ask for an adult. If there is none there at the time, I return at another time to complete the survey. What is the most prominent bias?

Accepted Answer

Response bias

Answer

Non-response bias

Answer

Voluntary response bias

Answer

Undercoverage

Question 7

I want to estimate the proportion of people in Chula Vista who own cats. I stand outside a local pet store and ask every 4th person whether they own a cat or not. What kind of sampling procedure is this?

Accepted Answer

Systematic Sample

Answer

Simple Random Sample

Answer

Stratified Sample

Answer

Cluster Sample

Question 8

I want to estimate the proportion of people in Chula Vista who own cats. I stand outside a local pet store and ask every 4th person whether they own a cat or not. What is the most prominent kind of bias evident?

Accepted Answer

Undercoverage

Answer

<p>Response</p>

Answer

Non-Response

Answer

Voluntary Response

Question 9

I want to estimate the proportion of adults in San Diego County who believe that the voting age should be reduced to 17. I get a list of all registered voters in the county and separate that list into several geographic regions and then collect an SRS from each geographic region. What kind of sampling method is this?

Accepted Answer

Stratified Sample

Answer

Simple Random Sample

Answer

Cluster Sample

Answer

Systematic Sample

Question 10

I want to estimate the proportion of adults in San Diego County who believe that the voting age should be reduced to 17. I get a list of all registered voters in the county and separate that list into several geographic regions and then an SRS from each geographic region. What kind of bias, if any, is evident in this sampling design?

Accepted Answer

There is no bias evident in the sampling design.

Answer

Response Bias

Answer

Non-Response Bias

Answer

Undercoverage Bias

Question 11

Many websites like Amazon and Yelp include customer ratings and reviews of products, restaurants, hotels, and so on. What is the predominant bias evident in these ratings and reviews?

Accepted Answer

Voluntary Response Bias

Answer

Response Bias

Answer

Non-Response Bias

Answer

Undercoverage Bias

Question 12

Many websites like Amazon and Yelp include customer ratings and reviews of products, restaurants, hotels, and so on. How does bias affect the ratings and reviews?

Accepted Answer

The bias probably underestimates the quality of the item.

Answer

The bias doesn't affect the ratings or reviews

Answer

The bias probably overestimates the quality of the item.

Answer

We don't know how the bias affects the ratings or reviews.

Question 13

A store manager wants to estimate the proportion of all the customers of the store who would use store credit card for their purchases. The manager selects a random sample of 1,000 customers from their customer loyalty program list and sends them a survey asking if they would be interested in applying for a store credit card. Seventy-eight customers respond to the survey. What kinds of biases are evident in this scenario? Select all that apply.

Accepted Answer

Non-Response Bias

Answer

Response Bias

Answer

Undercoverage Bias

Answer

Volundary Response Bias

Question 14

A store manager wants to estimate the proportion of all the customers of the store who would use store credit card for their purchases. The manager selects a random sample of 1,000 customers from their customer loyalty program list and sends them a survey asking if they would be interested in applying for a store credit card. Of the 78 customers who responded to the survey, 70 of them expressed interest in applying for a store credit card. Should the manager be concerned about these results? If so, why? Select all that apply.

Accepted Answer

Yes. Due to the low response rate, those who responded might be the people who are most interested in a store credit card and overestimate the population proportion of all customers who would be interested in a store credit card.

Accepted Answer

Yes. Since he only asked customers from the store loyalty program, those customers may be more interested in a store credit card than all customers.

Answer

The manager should not be concerned about these results.

Answer

Yes, because he should have asked more customers.

Sampling and Bias vocab

15 questions

What is a sample?

What is a representative sample?

I want a representative sample of likely voters. I use a telephone directory to randomly select 200 people. What is the most apparent bias?

I want to estimate the average number of hours EHS students spend playing video games. I sample all of my students. What kind of sampling method is this?

I want to estimate how many hours EHS students play video games daily. I get a list of all English classes and randomly select 6 English classes. I survey all the students in those 6 classes. What kind of sampling method is this?

I want to estimate the proportion of people in Chula Vista who own cats. I stand outside a local pet store and ask every 4th person whether they own a cat or not. What kind of sampling procedure is this?

I want to estimate the proportion of people in Chula Vista who own cats. I stand outside a local pet store and ask every 4th person whether they own a cat or not. What is the most prominent kind of bias evident?

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