Biostatistics & Research · single question

A data set has a MEDIAN of 64 and a MEAN of 60. Because the mean is pulled below the median, the distribution is:

  1. Symmetric (normal)
  2. Negatively (left) skewed
  3. Positively (right) skewed
  4. Bimodal
Show answer and explanation

Correct answer: B. Negatively (left) skewed

  • A. In a symmetric distribution the mean ≈ median.
  • B. Correct. Mean < median indicates a left (negative) skew (a tail of low values pulls the mean down).
  • C. Right skew would give mean > median.
  • D. Skew direction, not modality, is indicated by the mean–median relationship.

Note: The recall simply gave the values; this item tests interpreting the mean–median relationship.

Practice Biostatistics & Research questions Biostatistics & Research study notes

More Biostatistics & Research practice questions