6-10 multiple choice please

Question 6 (1 point) Consider the following probabilities X -4 -3 -2 -1 0 1 2 3 4 p(x) .02 -- .10.15 .30.18.10.06.02 What is p(-3)? O a) .02 b) .15 O c) . 30 O d) . 07 O e) .10Question 7 (1 point) Consider the following probabilities X -4 -3 -2 -1 0 1 2 3 4 p(x) .02.07 -- .15.30.18.10.06.02 What is the mean ? a) 0.00 O b) -0.02 O c) -0.01 O d) 0.02 O e) 0.01Question 8 (1 point) Consider the following probabilities X -4 -3 -2 -1 0 1 2 3 4 p(x) .02.07 -- .15.30.18.10.06.02 What is the variance o2 ? O a) 2.80 O b) 3.00 O c) 2.90 O d) 2.94 O e) 3.10Question 9 (1 point) Suppose x is a binomial random variable with n = 70 and p=0.9. What is the standard deviation 0'? Please choose the best answer. Question 10 (1 point) Let x be a binomial random variable and suppose n= 20, p=0.4. Then the mean u is: Ca) 12 Oh) 16