The number of patients waiting for flu vaccine at Karle clinic has the following
probability distribution:
X Prob

1 0.2

2 0.3

3 0.4

4 0.1

(a) What is the expected number of patients waiting for vaccine?

(b) What is the variance of the number of patients?

(c) What is the standard deviation of the number of patients?

1 0.2

2 0.3

3 0.4

4 0.1

(a) What is the expected number of patients waiting for vaccine?

(b) What is the variance of the number of patients?

(c) What is the standard deviation of the number of patients?