CCSS.Math.Content.HSS.IC.B.3

A poll is taken from 100 seniors in a high school where the senior class has 575 students. This is an example of a  ______________.

• Sample
• Population

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CCSS.Math.Content.HSS.IC.B.3

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of:

• Cluster Sampling
• Systematic Sampling
• Stratified Sampling
• Simple Random Sampling

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CCSS.Math.Content.HSS.IC.B.3

To ensure that the experiment results are valid it is important that the experiment be...

• Replicated
• Controlled
• Randomized
• All of the above

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CCSS.Math.Content.HSS.IC.B.3

Runners after an ultramarathon commonly develop respiratory infections. We want to know if taking 600 milligrams of vitamin C daily will reduce these infections. Researchers randomly assigned 100 ultramarathon runners to receive either vitamin C or placebo. All subjects were watched for 14 days after the big race to see if infections developed. What are the possible lurking variables?

• Age of the runner
• weight of the runner
• gender of the runner
• all of the above

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CCSS.Math.Content.HSS.IC.B.3

Determine the type of sampling used in the following scenario: Starting at 8:00 Monday morning the first 50 students entering the front doors are selected to be in the sample.  This is what type of sampling design? 

• Systematic
• Voluntary Response
• Cluster
• Convenience

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CCSS.Math.Content.HSS.IC.B.3

Why do we want our experiments to have random elements in them?

• To reduce variability

• To increase variability

• To reduce bias

• To increase bias

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CCSS.Math.Content.HSS.IC.B.3

Questioning students as they leave a university library, a researcher asks 358 students about their drinking habits.

This is what type of sample?

• cluster

• convenience

• systematic

• stratified

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CCSS.Math.Content.HSS.IC.B.3

The group of subjects in a trial that do not recieve any treatment

• control group

• treatment group

• controlled study

• blind study

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CCSS.Math.Content.HSS.IC.B.3

Determine if the following study is biased.

The first 100 people at the park Thursday were asked if dogs should be off leashes in the park.

• Biased

• Unbiased

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CCSS.Math.Content.HSS.IC.B.3

Determine if the following study is biased.

You want to know your town's favorite fast-food restaurant. You randomly ask 30 people their preference as they leave a McDonald's restaurant.

• Biased

• Unbiased

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CCSS.Math.Content.HSS.IC.B.3