answer and discuss the following

1) In statistics, the range of a set of data is the difference between the largest and smallest values. Discuss.

2) In descriptive statistics, the interquartile range (IQR), also called the midspread, middle 50%, or Hspread, is a measure of statistical dispersion, being equal to the difference between 75th and 25th percentiles, or between upper and lower quartiles, IQR = Q3 Q1. Discuss.

3) Average Deviation (Average Absolute Deviation). Discuss.

4) Standard Deviation vs. Variance: What's the Difference? Discuss.