correlationA pattern where two quantities tend to change together: both rise, or one falls as the other rises. It does not prove that one causes the other.
You’ll leave with these skills
01Tell which group a survey’s results apply toCheck which group the sample was randomly chosen from, and cross out any answer choice that talks about a larger or different group.
02Find the range of plausible values from a margin of errorSubtract the margin of error from the sample’s percent and add it to get the lowest and highest plausible percents for the population.
03Tell whether a study can show cause and effectLook in the study’s description for random assignment to groups before you accept a claim that one thing causes another.
04Turn a margin of error into a range of people in the populationAdd and subtract the margin of error from the sample’s percent, then multiply the low and high percents by the number of people in the population.
This lesson is part of the full library
207 lessons that teach every skill the SAT tests
71Math
40Reading
24Grammar
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