A Reasonable Explanation for Why 40-Year-Olds and 60-Year-Olds Show Differences

question 70

Multiple Choice

A reasonable explanation for why 40-year-olds and 60-year-olds show differences in intelligence test scores is:

• A)secular trends.
• B)cohort effects.
• C)declining IQ with age.
• D)biases in IQ testing.

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Definitions:

Body Fat Percentages

A measure of the proportion of fat in an individual's body compared to their total body mass.

Unimodal

Describes a distribution with a single prominent peak or mode, representing the most frequently occurring value in the data set.

Symmetric

A characteristic of shapes or patterns that are identical on both sides when divided by a central line or axis.

Skewed

A description of data in which the distribution is not symmetrical, but instead has a longer tail on one side of the peak or the other, indicating an asymmetry.