Which property is described for the normal distribution in the material?

• A. It is perfectly symmetrical and has a skew of 0.
• B. It is always skewed.
• C. It has a high kurtosis.
• D. It is always bimodal.

Answer: (D)

The normal distribution is characterized by being perfectly symmetrical around the center and having a single peak, so its skew is zero and it is unimodal. It does not have two peaks, which would be bimodal, and it does not have high kurtosis—the standard bell curve is considered mesokurtic with tails that match the typical normal shape. So describing it as always bimodal doesn’t fit the normal distribution. The hallmark properties you’re looking for are symmetry (skew ≈ 0) and a single central peak.