Consider the following data set:4.35.45.412.112.13.28.78.710.9-9.828.714.3-5.49.811.15.48.7-3.233.2-4.32.13.222.125.45.429.826.50.1-8.7-5.40.115.4-4.335.421.115.419.823.24.36.5-2.112.124.336.515.43.2-5.42.1 CLASS-10 up to 00 up to 1010 up to 2020 up to 3030 up to 40a-1. Construct the frequency distribution using classes of -10 up to 0, 0 up to 10, etc.a-2. How many of the observations are at least 10 but less than 20?b-1. Construct the relative frequency distribution and the cumulative frequency distribution. (Round "Relative Frequency" and "Cumulative Relative Frequency" to 3 decimal places.)b-2. What percent of the observations are at least 10 but less than 20? (Round your answer to 1 decimal place.)b-3. What percent of the observations are less than 20? (Round your answer to 1 decimal place.)c. Graph a relative frequency polygon to determine if the distribution is symmetric. If not, then how is it skewed?

14.3 13.2 4 . 10.9 8.7 7.6 6.5 10.9 11.1 14.3 9.8 7.6 10.9 3.2 11.1 8. 7 5.4 6.5 5.4 12.1 12.1 3.2 8.7 8. 7 8.7 8.7 4.3 5.4 11.1 5.4 8.7 -3.2 10.9 -9.8 28.7 14.3 -5.4 9.8 33.2 -4.3 2.1 3.2 22.1 25.4 5.4 29.8 26.5 0.1 23.2 -8.7 -5.4 15.4 -4.3 35.4 15.4 19.8 0.1 21.1 -2.1 12.1 24.3 36.5 15.4 3.2 -5.4 2.1 4.3 6.5 Click here for the Excel Data File a-1. Construct the frequency distribution using classes of -10 up to 0, 0 up to 10, etc. Class Frequency -10 up to 0 0 up to 10 10 up to 20 20 up to 30 30 up to 40 Total a-2. How many of the observations are at least 10 but less than 20? Number of observations b-1. Construct the relative frequency distribution and the cumulative frequency distribution. (Round "Relative Frequency" and "Cumulative Relative Frequency" to 3 decimal places.) Relative Cumulative Class Frequency Relative Frequency -10 up to 0 0 up to 10 10 up to 20