d Compute the standard deviation for ages of super shoppers The standard deviation of a discrete probability distribution is found by x p x Use 45 66 and the following table to help you compute the standard deviation o for ages of shoppers Round your answers to four decimal places X P x 0 23 0 05 34 45 0 42 0 18 56 0 12 67 0 23 0 xP x 23 0 05 1 1500 34 0 42 14 2800 8 1000 6 7200 x 23 45 66 22 6600 34 45 66 11 6600 0 6600 10 3400 x 22 6600 2 513 4756 11 6600 135 9556 0 4356 106 9156 Add together the x 2p x Round your answer to four decimal places x P x 25 6738 57 1014 0 0784 12 8299 Finally take the square root of x p x Round your answer to two decimal places x P x x p x 513 4756 0 05 25 6738 135 9556 0 42 57 1014 0 0784 12 8299