19. Find the mean, median, mode and the standard deviation of the distribution and determine if the distribution is skewed or symmetrical. Show all work and then you may check answer using your calculator. Calculate the 5-number summary for the distribution and draw a box plot and a stem and leaf plot for the distribution. Show all work. 16, 24, 16, 25, 20, 20, 26, 20, 26 20. Here is a frequency table for a distribution: bin frequency 1-5 12 6 - 10 15 11 - 1518 16 - 20 8 a. Estimate the median of this distribution. b. Estimate the mean of this distribution. 21. For the normal distribution with mean 72 and standard deviation 3, what percent of all observations will fall between 69 and 75? Draw a Bell-curve and illustrate your answer and give the percentage