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

210 college students were randomly assigned to play either a violent or nonviolent video game.  A short time later, the students were presented with the opportunity to trivially harm another person and results comparing the two groups were recorded.
Is this study OBSERVATIONAL or EXPERIMENTAL? 

• Observational
• Experimental

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

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

Tags

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

Tags

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

The conductor has control over the environment in this setting

• experiment
• observational study
• population
• sample

Tags

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

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

The group of participants who do not receive a treatment.

• Experimental
• Treatment
• Sample
• Control

Tags

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

Tags

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

A market research company wishes to find out whether the population of students at a university prefers Starbucks or Dunkin Donuts. A random sample of students is selected, and each student is asked first to try both but the order they try them is randomly decided with a coin toss (heads: Starbucks, then Dunkin. tails: vice versa). They then indicate which brand they prefer. This is an example of

• a completely randomized experiment
• an observational study
• a stratified sample
• a matched pairs experiment

Tags

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

Tags

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

Tags

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

Tags

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