I Am a Rat Whose Cortex Is Lighter and Thinner

question 26

Multiple Choice

I am a rat whose cortex is lighter and thinner than my littermates. What happened to me?

• A)You were born prematurely.
• B)You suffer from fetal alcohol syndrome.
• C)You were raised in an enriched environment.
• D)You were raised in a deprived environment.

---

Definitions:

Null Hypothesis

A hypothesis that assumes no significant difference or relationship exists in the general population from which a sample is drawn.

Variance

A measure of the dispersion of a set of data points around their mean; the square of the standard deviation.

Level of Significance

The probability threshold below which the null hypothesis is rejected in hypothesis testing, typically denoted by alpha (α).

Null Hypothesis

A statement that there is no effect or no difference, and it serves as the default or starting assumption in hypothesis testing.