Which of the following statements about measures of dispersion is/are correct?
1. The range is the difference between the highest and lowest values in a dataset.
2. The interquartile range is affected by outliers.
3. The standard deviation is a measure of how spread out the numbers in a dataset are.
4. The Gini coefficient is a measure of statistical dispersion intended to represent income or wealth inequality.
1
1, 2, and 3 only
2
2 and 4 only
3
1, 3, and 4 only
4
1, 2, 3, and 4