What do the inflection points on a normal distribution represent? Where do they occur?
What do the inflection points on a normal distribution represent? Choose the correct answer below.
A. They are the points that mark the boundaries of the middle $50 \%$ of the area under the curve.
B. They are the points at which the curve changes sign.
C. They are the points at which the cumulative area under the curve is 0 and 1 .
D. They are the points at which the curve changes between curving upward and curving downward.
Answer
Final Answer: \(\boxed{\text{D. They are the points at which the curve changes between curving upward and curving downward.}}\)
Step 1 ：The inflection points on a normal distribution are the points at which the curve changes between curving upward and curving downward. This is a property of inflection points in general, not just for normal distributions. Therefore, the correct answer is D. This is a theoretical question and does not require Python code to solve.
Step 2 ：Final Answer: \(\boxed{\text{D. They are the points at which the curve changes between curving upward and curving downward.}}\)
