Compute the variance of random variable, Y. Y 1 P(Y) 0.25 0.5 0.25 Select one: a. 0.34 O b.0.5 C. 0.25 O d. 0.7

Find the variance for the probability distribution 4 0 1 2 3 P(X=x) 0.04 0.18 0.34 0.23 0.21 Select one: а. 1.12 b. 1.26 с. 1.59 d. 3.79

Let be a normally-distributed random variable with mean u= 100 and variance 2 = 16: Select which statement is true. P(94 < X< 106) = 0.68 approximately. P(92 < X< 108) = 0.68 approximately. P(86 < X<114) = 0.68 approximately. none of these P(96 < X< 104) = 0.68 approximately.

(b) M is discrete random variable that has the expected value 25 and variance 3. Find: i. E(3M +24) ii. Var (2M – 14) + E(4M)

Let X be a random variable with mean u= E(X) = 10.33 and variance o = 12.81. Determine: E{10- E 10- 4

# Consider a random variable X with the expected value of 5 and E (X²) = 40. Calculate the variance of X. 15 i 9

Activity 2: Determine the Variance and Standard Deviation of each random variable. 1) 1 3 4 1 1 1 P(x) 2. 4 9. 8. P(x) 0.6 0.1 0.2 0.1 1/5 5 2)

Q2: A random variable X has a mean = 8, a variance o² = 9, and an unknown probability distribution. Find P(X-826).