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 8 4 6 89 4 3 5 2784 4 3 6, what are commonly used measure of variability? 7, what is coefficient of skewness? coefficient of variation? standard deviation?