Choose a person aged 19 to 25 years at random and ask: "In the past seven days, how many times did you go to an exercise or fitness center or work out?" Call the response Y for short. Based on a large sample survey, here is the probability distribution of Y5
[image 1]
(a) A histogram of the probability distribution is shown. Describe its shape.
[image 2]
(b) Calculate and interpret the expected value of Y.