M5T2 #2

Mrs. Trahan samples her class by selecting every third person on her class list.  Which type of sampling method is this?

• Simple
• Systematic
• Stratified
• Cluster

Farmer Joe's apple tree farm is set up in 100 rows.  He counts the number of apples produced on every 10th row to estimate the number apples produced on the whole farm.  This is _____________ sampling.  

• Simple
• Stratified
• Cluster
• Systematic

Farmer Joe randomly picks 100 trees using a random number generator to estimate the number of apples produced by his apple trees.  This is ______________ sampling.

• Simple
• 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
• Simple

Group the businesses according to type: medical, shipping, retail, manufacturing, financial, construction, restaurant, hotel, tourism, other. Then select a random sample of 10 businesses from each business type. What kind of sampling techniques is this?

• Systematic sampling

• Cluster Sampling

• Stratified sampling

• Convenience sampling

Identify the population and sample.

A survey of 1535 American households found that 18% of households do not own a computer.

• Population: 1535 American households

  Sample: 18% of households

• Population: All American households

  Sample: 1535 American households

• Population: All American households

  Sample: 18% of households

• Population: 1535 American households

  Sample: 276 households

Which sampling technique involves dividing a population into groups, then randomly selecting individuals from each group.

• Simple Random Sample
• Stratified
• Cluster
• Systematic

Which sampling technique involves selecting every nth subject in a population?

• Simple Random Sample
• Stratified
• Cluster
• Systematic

A local candle store surveys 50 customers to find out their opinion on a new scented candle. The customers were chosen randomly from the store mailing list.

Is this sampling method random?

• Yes

• No

A researcher wants to investigate the relationship between coffee consumption and heart health. They design a study where they survey individuals about their coffee consumption habits and measure their cholesterol levels. However, they fail to account for another variable that may confound the relationship between coffee consumption and cholesterol levels.

Which of the following could be a confounding variable in the researcher’s study?

• time of day when coffee was consumed

• activity level (exercise)

• gender of participants

• age of participants