The Correlation in IQ Scores Between Identical Twins Reared Apart

question 45

Multiple Choice

The correlation in IQ scores between identical twins reared apart is higher than that between fraternal twins reared together.What does this suggest about intellectual development

• A) It is not affected by either genetics or environmental factors. 
• B) It is influenced more by genetics than by environmental factors. 
• C) It is influenced more by environmental factors than by genetics. 
• D) It is affected equally by genetics and environmental factors.

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Definitions:

Least Squares

A mathematical approach to find the best-fitting curve to a given set of points by minimizing the sum of the squares of the offsets ("the residuals") of the points from the curve.

Statistical Software

Computer programs designed for performing statistical analysis on data, including computations of descriptive statistics, inferential statistics, and graphically representing data.

SST

Total sum of squares in statistical analysis, representing the total variation in a dataset.

Total Sum Of Squares

A measure of the total variation within a dataset, calculated as the sum of squared differences from the mean.