STATS U1L10 Sampling Methods & Sources of Bias

Which sampling method does not require a frame?

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Why are convenience samples ill advised?

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Identify the type of sampling used:

To estimate the percentage of defects in a recent manufacturing batch, a quality-control manager at Intel selects every 8th chip that comes off the assembly line starting with the 3rd until she obtains a sample of 140 chips.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling used:

To determine the prevalence of human growth hormone (HGH) use among high school varsity baseball players, the State Athletic Commission randomly selects 50 high schools. All members of the selected high schools' varsity baseball teams are tested for HGH.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling used:

To determine customer opinion of its boarding policy, Southwest Airlines randomly selects 60 flights during a certain week and surveys all passengers on the flights.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling used:

A member of Congress wishes to determine her constituency's opinion regarding estate taxes. She divides her constituency into three income classes: low-income households, middle-income households, and upper-income households. She then takes a simple random sample of households from each income class.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling used:

In an effort to identify whether an advertising campaign has been effective, a marketing firm conducts a nationwide poll by randomly selecting individuals from a list of known users of the product.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling used:

A radio station asks its listeners to call in their opinion regarding the use of U.S. forces in peace keeping missions.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling used:

A farmer divides his orchard into 50 subsections, randomly selects 4, and samples all the trees within the 4 subsections to approximate the yield of his orchard.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3

Identify the type of sampling used:

A college official divides the student population into 5 classes: freshmen, sophomore, junior, senior, and graduate students. The official takes a simple random sample from each class and asks the members' opinions regarding student services.

• Simple random sampling

• Stratified sampling

• Systematic sampling

• Cluster sampling

• Convenience sampling

Tags

CCSS.HSS.IC.B.3