Question 9 Calculation For a group of four 40-year old men, the probability distribution for the number a who live through the next year is as given in the table below. P(z) 0 0.0+ 1 0.0+ 2 0.0007 3 0.0426 4 0.9567 Verify that the table is indeed a probability distribution. Then find the mean of the distribution. mean = Report answer accurate to. 1 decimal place. Question Help: Message instructor