Need Help with this one, Thank you!

What is the variance of the probability 3 points What is the variance of the probability 3 points distribution? * distribution? * X 2 4 6 8 X 0 P(X) 1/5 1/5 1/5 1/5 1/5 P(X) 1/8 3/8 3 / 8 1/8 O a. 4.15 a. 0.75 O b. 6.35 O b. 1.00 O C. 8.00 O c. 1.25 O d. 7.50 O d. 0.50 What is the mean of the probability 3 points distribution? * Find the mean and variance of the 6 points following distributions * X 15 15 15 15 15 a. 1.5 X 2 5 P(X) 1/10 3/10 1/10 2/10 3/10 O b. 2.0 O Which of the following is NOT a true 1 point C. 3.5 statement? * O d. 4.0 What is the mean of the probability 3 points O a. The value of a random variable could be zero distribution? * O b. Random variables can only have one value P(X) 1/8 3 / 8 3 / 8 1/8 O c. The probability of the value of a random O a. 1.5 variable could be zero b. 1.2 O d. The sum of all the probabilities in a probability distribution is always equal to one If P(X) = X/6, what are the possible 2 points C. 1.6 values of X for it to be a probability distribution?* What is the standard deviation of the 3 points O d. 1.8 probability distribution? * P(X ) 1/2 1/3 1/6 a. 0,2,3 P(X) 1/8 3 / 8 3/8 1/8 b. 1,2,3 O a. 1.00 c. 2,3,4 O b. 0.87 O d. 1, 1, 2 O c. 1.12 O d. 0.71