Probability based on normal distribution.
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb
a) Find the likelihood that an individual male Siberian tiger will weigh more than 450 lb.
b) Find the likelihood that a random sample of 4 male Siberian tigers will have a sample mean weight more than 450 lb.
c) What is the possibility that the drug will be effective for 3 hours or more?