Question

Which of the following are measures of variation (dispersion)?
1. Mean
2. Standard deviation
3. Range
4. Mean deviation

• A. (A) and (B) only.
• B. (A), (B) and (D) only.
• C. (B) and (D) only.
• D. (B), (C) and (D) only.

Hint:

Measures of dispersion help understand the variability in data and complement measures of central tendency like the mean.

Answer 1

The Correct Option is D

Measures of dispersion quantify the spread or variability within a dataset.
Key measures of dispersion include:

• Standard deviation: Measures data variation or dispersion.
• Range: The difference between a dataset's maximum and minimum values.
• Mean deviation: The average of the absolute deviations of data points from the mean.

The mean represents central tendency, not dispersion. Therefore, only options (B), (C), and (D) are correct.