statsssss ANSWER 3 AND 4 ONLY

rature, and par ACTIVITY 1 dings corr mical r 1. Let X be a random variable with the following probability distribution. onverte com 13 4 sub X 2 0.1 0.4 0.3 0.2 P(X=X ) a. Find E(X) and Var(X). 2. Let X be a random variable with the following probability distribution. X 5 10 15 20 25 P(X=x) 0.05 0.3 0.25 0.25 0. 15 a. Find the expected value and variance. 3. The number of suits sold per day at a department store is shown in the table, with the corresponding probabilities. Find the Mean u = E(x), Variance oz and Standard deviation o of the distribution. Number of suits sold, x 19 20 21 22 Probability, P(X=x) 23 0.2 0.2 0.3 0.2 0. 1 4. Let X be a discrete random variable with the probability distribution given in the table below: X 10 1 2 3 4 5 P(X=X) 0.05 0.1 0.2 0.4 0.2 0.05 a. Find u ,02 and 6