AP Statistics Semester 1 Review

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What is a Census in data collection?

Back

A Census is a method of data collection where information is gathered from every member of the population.

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CCSS.6.SP.B.5B

Front

What does the correlation coefficient (r) measure?

Back

The strength and direction of the linear relationship between two quantitative variables.

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CCSS.HSS.ID.C.8

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What does random scatter in a residual plot indicate?

Back

It indicates that a linear model is appropriate for the data.

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CCSS.HSS.ID.B.6B

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What does a z-score tell you?

Back

A z-score tells you how many standard deviations away from the mean a score lies.

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How do you compare scores from different normal distributions?

Back

You can compare scores by calculating their z-scores.

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CCSS.HSS.ID.A.4

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What is a Simple Random Sample?

Back

A Simple Random Sample is a subset of a population where each member has an equal chance of being selected.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a Cluster Random Sample?

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A Cluster Random Sample involves dividing the population into clusters and then randomly selecting entire clusters.

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CCSS.HSS.IC.B.3

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What is a Stratified Random Sample?

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A Stratified Random Sample involves dividing the population into subgroups (strata) and then randomly sampling from each stratum.

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CCSS.HSS.IC.B.3

Front

What does it mean if two variables have a strong correlation?

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It means that as one variable changes, the other variable tends to change in a predictable way.

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CCSS.HSS.ID.B.5

Front

What is the mean in a normal distribution?

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The mean is the average value of the data set and is the center of the normal distribution.

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CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2