The probability that 0, 1, 2, 3 or 4 people will seek treatment for the flu during any given hour at any given emergency room is shown in the following distribution.
X--> 0 1 2 3 4
P(x)->.12 .25 .33 .24 .06
a) Calculate the mean of X and interpret this value in context.
b) What are the variance and standard deviation of X?