A Professor Who Has Two Sections of the Same Course

question 73

Multiple Choice

A professor who has two sections of the same course gives an exam.Both classes have the same mean score on the exam.However,in Class A most students scored relatively close to the mean,while in Class B many students scored either much higher or much lower than the mean.Which statement best describes the distribution of grades for the two classes?

• A) the standard deviation will be the same for the two classes
• B) the standard deviation will be larger for Class A than for Class B
• C) the standard deviation will be smaller for Class A than for Class B
• D) not enough information is provided to draw any conclusion regarding the standard deviation

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Definitions:

Motor Skills

The abilities required to perform precise physical actions using muscle coordination and control.

Arnold Gesell

An American psychologist and pediatrician known for his work in child development and for establishing developmental milestones.

Jean Piaget

A Swiss psychologist known for his pioneering work in child development, especially his theory of cognitive development.

Built-In Reactions

Inherent responses present from birth that are physiologically based and do not need to be learned, such as reflexes or instinctive behaviors.