54321120 Or 6. Mean Deviation 6 3 3 2 1 2 6 7 8 30 8 375. Area of Isoscele Triangle frac12bh Altitude of an Isosceles Triangle sqrta2-fracb24 Perimeter of Isosceles TriangleP 2ab Where b Base h Height a length of the two equal sides.
Area of an Right Triangle fracsqrt12bh.
So the mean 9 and the mean deviation 375. An exclamation point denotes something called a factorial. For a discrete probability distribution the mean is given by where the sum is taken over all possible values of the random variable and is the probability. Mean Sum of All Data Points Number of Data Points There is another way of calculating mean which is not very commonly used.