A Big Difference in the Traits of Siblings Is Due

question 29

Multiple Choice

A big difference in the traits of siblings is due to:

• A) shared environments.
• B) nonshared environments.
• C) twinning.
• D) sex-linked heritage.

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Definitions:

Multiple R

A statistic that represents the correlation between observed and predicted values of a dependent variable in a regression analysis, indicating model fit.

R Square

The ratio of the variance in the outcome variable that can be attributed to the influence of predictor variables in a regression analysis.

Dependent Variables

Variables in an experiment or model that are affected by changes in the independent variables, typically outcomes or results being measured.

Categorical Variable

A variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other entity to a particular group or nominal category.