1. Given the data set A = {5, 4, 6, 14, 2, 2, 11, 4, 5, 8, 3, 1, 12, 15, 13}, which is the data of a sample taken from a larger population.
   1. Calculate the arithmetic mean (5 pts)
   2. Find the median (5 pts)
   3. Find the mode (5 pts)
   4. Calculate the range (5 pts)
   5. Calculate the interquartile range (5 pts)
   6. Calculate the mean deviation (5 pts)
   7. Calculate the variance (5 pts)
   8. Calculate the standard deviation (5 pts)