1. Give the main difference between quartile deviation and coefficient of quartile deviation.
e) The joint probability density function of x and y is given by f(x, y)=. [2e-*->,0≤ x ≤ y < ∞ [0, elsewhere (2 marks) Find f(x) and f(y), the marginal probability functions of x and y respectively and test for independence. (5 marks)
f) The number of deaths of dolichos lab lab seedlings by a certain pest in a certain plot follows Poisson process with parameter = 2 per day. Let X be the number of deaths by the given pest per day. Find P(X ≥3) (2 marks)
g) Suppose that a random variable X has a Binomial distribution with parameters n = 8 and P=0.7, find P(X ≥5). (4 marks)​