Dr Hardhead Has Developed a Measure of Stubbornness and Wants

question 195

Multiple Choice

Dr. Hardhead has developed a measure of stubbornness and wants to determine the influence of genetics on performance on his new measure. Which of the following findings from administrations of the new test provides the best evidence for genetic influence?

• A) Scores are more highly correlated in identical twins reared together than identical twins reared apart.
• B) Scores are more highly correlated in identical than fraternal twins.
• C) Scores are highly correlated between adopted children and their adoptive parents.
• D) Scores are highly correlated between siblings.

---

Definitions:

Vertical Axis

An imaginary line that runs up and down, perpendicular to the horizontal plane.

Relative Frequency Histogram

A graphical representation of the relative frequency of various outcomes in a data set, showing how often each value occurs relative to the total number of values.

Bar Width

In the context of a bar chart or histogram, it refers to the thickness or size of each bar, which can affect the chart's readability and interpretation.

Quantitative Data

Numerical information that represents quantities or amounts, allowing for measurement and statistical analysis.