The histogram shows the reviewer ratings on a scale from 1 (lowest) to 5 (highest) of a recently published book. Reviewer Ratings (a) Find the mean, variance, and standard deviation of the probability distribution. 0:5- (b) Interpret the results. 0.4- 0.3- Probability 0.213 02 02- E 0.1- 0 092 0.019 NO- 3 X Rating Reviewer Ratings 0.5 (a) The mean is 0.434 (Type an integer or a decimal. Do not round.) 0.4- 0.3- Probability 0.242 0.213 0.2- 0.1- 0.092 0.019 0.0 N- Rating