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____________________is a court ruling attributed to reductions in crime.
Barack Obama
The 44th President of the United States, serving from 2009 to 2017, notable for being the first African American to hold the office.
Standard Deviation
A way of measuring how much variety or distribution exists among numerical values.
Expected Value
In probability theory, a weighted average of all possible values of a random variable, reflecting its anticipated outcome.
Sample Proportion
A statistic that estimates the fraction of the population that has a certain trait, characteristic or behavior, calculated as the number of observations in the sample with that trait over the total sample size.
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