AP Statistics Sampling Types and Bias

Sam tested every 50th candy bar from the assembly line to make sure there were enough peanuts in each bar.  He found 15% did not have enough peanuts.  Which type of sampling did he use?

• Cluster
• Systematic
• Convenience
• Simple Random

The teacher samples her class by randomly selecting 5 girls and then randomly selecting 7 boys.  This type of sampling is called?

• Stratified
• Systematic
• SRS
• Cluster

The teacher samples her class by selecting all students sitting at table 1 and table 5 in her classroom.  This sampling technique is called?

• SRS
• Stratified
• Systematic
• Cluster

The teacher samples her class by picking 10 names from slips of paper in a hat.

• Systematic
• SRS
• Stratified
• Cluster

Farmer Joe separates his apple tree farm into 10 regions.  He counts the number of apples produced in just one of the regions and uses that estimate to predict the number of apples produced on the whole farm.  This is _______ sampling.

• SRS
• Cluster
• Stratified
• Systematic

Source of bias that occurs when you ask people who are EASY to ask

• Response Bias
• Convenience Sampling
• Nonresponse
• Voluntary Response

Farmer Joe randomly picks 25 trees using a random number generator to estimate the number of apples per tree. 

• SRS
• Stratified
• Cluster
• Systematic

Farmer Joe separates his farm into 10 regions.  He then randomly selected 5 trees from each region to estimate the number of apples produced on his apple tree farm.  This is _____________ sampling.  

• Cluster
• Systematic
• Stratified
• SRS

When one examines the entire population instead of a subgroup of the population, this is called a ____________.

• Sampling
• Census
• Bias

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the five closest to her desk.

• simple random
• Voluntary Response
• Convenience
• Systematic Random