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The IQ Score of the Average 20-Year-Old Is 15 Points

question 43

Short Answer

The IQ score of the average 20-year-old is 15 points higher than the performance of the average 20-year-old in 1940.This phenomenon is termed the _____effect.


Definitions:

Sample Standard Deviations

A measure that quantifies the amount of variation or dispersion of a set of data values from its sample mean.

Equal Sample Sizes

A condition in statistical analysis where the number of observations in each group being compared is the same.

Confidence Interval

A range of values, derived from the sample statistics, that is likely to contain the value of an unknown population parameter with a certain degree of confidence.

Margin Of Error

An indication of the confidence in the results of a survey or experiment, showing how much the answers may deviate from the true value.

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