Questions: 1, The test results of a sample are 2, 3, 5, 7, 8,9, the standard deviation is ? 2, What is the mean absolute deviation for a sample data set? 3, A distribution of numbers is approximately bell shaped. If the mean of the numbers is 125 and the standard deviation is 12, between what two numbers would approximately 68% of the values fall? Between what two numbers would 95% of the values fall? Between what two values would 99.7% of the values fall? 4, The average of the squared deviations from the arithmetic mean is called? 5, Determine the mode and the median for the following numbers 2 4 84 6 2 78 4 3 8 943 5 6, what are commonly used measure of variability 7, what is coefficient of skewness? coefficient of variation? standard deviation