. Using the following dataset, 5, 3, O, 8, -7, Find [2 marks each]: a. 2(x2-l-x2) Tl. b. 21:2 (Ex)2 0. 2x3 . Given the following mean and median for a dataset, determine whether it is leftwardly skewed, rightwardly skewed or symmetric. [1 mark each] a. Mean = 3 and Median = 80 b. Mean = 2 and Median = 2 c. Mean = -9 and Median = -9 . Calculate the range and standard deviation for the following:[6 marks each] a. 5, -4, -6. 3, -3, -7. -5, 0, 7, 10 b. -3,0,1, 1,2, 3,18,6,1,2,10,1O . A dataset has a standard deviation of 2 with its largest value being 80 and smallest being 60. What values would the standard deviation need to fall between for you to know it is correct(based on the range of the dataset)? Is the standard deviation given oonect? [3 marks] . For the following numbers, 12, 1, 17, 9, 11, 18, 12, 2, 12, 9 Find: [2 marks each] a. 30th percentile b. 50th percentile c. 75th percentile