Consider the following data set:

a. Construct a frequency distribution using classes of 210 up to 0, 0 up to 10, etc. How many of the observations are at least 10 but less than 20?
b. Construct a relative frequency distribution and a cumulative relative frequency distribution. What percent of the observations are at least 10 but less than 20? What percent of the observations are less than 20?
c. Graph a relative frequency polygon. Is the distribution symmetric? If not, then how is itskewed?

4 1087 6 10 11 14 13 14 3 985 76 10 3 11 11 8 8 4 55 12 12 3 8 8 10 -928 14 5 9 11 583 334 23 22 255 29 260 8 5 0 154 35 21 15 19 23 4| 6|-2 | 12 | 24 | 36 | 15| 31-5| 2 2 2