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A researcher who measures the extent to which genetic factors influence the trait of narcissism is taking an evolutionary approach.
Standard Deviation
A statistic that measures the dispersion or spread of a set of data points relative to its mean.
Point Estimate
A single value (or point) estimate derived from sample data to approximate a population parameter.
Confidence Interval
A range of number sets, derived from statistical analyses of samples, assumed to hold the invisible value of a population characteristic.
Margin of Error
An expression of the range within which the true value of a statistic is expected to fall, based on sample observations.
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