Calculate the mean, the variance, and the standard deviation of the following discrete probability distribution. (Negative values should be indicated by a minus sign. Round intermediate calculations to at least 4 decimal places. Round your final answers to 2 decimal places.) X -36 -22 -10 -7 P(X = x) 0.33 0.33 0.24 0.10 Mean 9.50 X Variance 172.47 X Standard deviation 1