CCSS.Math.Content.HSS.IC.B.5

What does it mean when a test is statistically significant?

• it has reached alpha level status
• the test statistic had a P-value higher than the alpha level
• the test statistic had a P-value lower than the alpha level
• it is important in practical terms

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CCSS.Math.Content.HSS.IC.B.5

How can you reduce both Type I and Type II errors?

• it can't be reduced
• redo the tests
• increase the sample size
• tamper with the data

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CCSS.Math.Content.HSS.IC.B.5

The conductor has control over the environment in this setting

• experiment
• observational study
• population
• sample

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

CCSS.Math.Content.HSS.IC.B.5

Assigning treatment groups by pairing subjects according to a similarity. One subject in the pair is randomly selected to receive one treatment while the other subject receives the other treatment

• Randomized Block Design
• Matched Pairs Design
• Random Selection

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CCSS.Math.Content.HSS.IC.B.5

A report in a medical journal notes that the risk of developing Alzheimer's disease among subjects who regularly opted to take Ibuprofen was about half the risk among those who did not.  Is this good evidence that Ibuprofen is effective in preventing Alzheimer's?

• Yes, because the study was a randomized, comparative experiment
• No, because the effect of Ibuprofen is confounded with the placebo effect
• No, because this is an observational study.  An experiment would be needed to confirm (or not confirm) the observed effect.
• Yes, because a 50% reduction can't hapen just by chance

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

CCSS.Math.Content.HSS.IC.B.5

Determining if students using a calculator on a math final exam score better than students who do not use a calculator 

• Cenus
• Sample Survey
• Experiment
• Observational Study

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

CCSS.Math.Content.HSS.IC.B.5

Choosing people at random at the supermarket and asking them to taste two brands of orange juice to determine which brand they prefer.

• Census
• Sample Survey
• Experiment
• Observational Study

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CCSS.Math.Content.HSS.IC.A.1

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

CCSS.Math.Content.HSS.IC.B.5

Determine if people who take vitamin C every day are less likely to get colds.

• Cencus

• Sample Survey

• Experiment

• Observational Study

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CCSS.Math.Content.HSS.IC.B.5

a controlled study in which the researcher attempts to understand cause-and-effect relationships by assigning subjects to groups and deciding which treatments each group receives

• survey

• observational study

• experiment

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CCSS.Math.Content.HSS.IC.B.5

To determine whether sugar affects an athlete’s performance at practice, Coach Barron gave half the team doughnuts for breakfast and the other half whole grain cereal. He compared the two groups in terms of endurance and energy. This is an example of:

• Observational Study

• Experimental Study

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

CCSS.Math.Content.HSS.IC.B.5