The student has not given the options so I am listing all
dispersion measures in Statistics for his help is:
- Standard deviation
- The interquartile range (IQR)
- Range
- Mean absolute difference (also known as Gini mean absolute
difference)
- Median absolute deviation (MAD)
- Average absolute deviation (or simply called average
deviation)
- Distance standard deviation
- Coefficient of variation
- Quartile coefficient of dispersion
- Relative mean difference
- Variance (the square of the standard deviation)
- Variance-to-mean ratio
If the student can share the options that I can help in a better
way.