Question

Need problem solving process and the steps

version 2 Questions 03 - 05 In a poll, 60% of adults think that protecting the environment should be given priority over developing energy supplies. Q03 Suppose that a random sample of 3 adults is asked on the subject. What is the probability that 2 of them think that protecting the environment should be given priority over developing energy supplies? (a) 33.4% (b) 37.5% (c) 40.8% (d) 43.2% (e) 44.1% Answer (d) 43.2 Q04 Suppose that a random sample of 10 adults is asked on the subject. What is the expected number of adults who do NOT think that protecting the environment should be given priority over developing energy supplies? (a) 0.4 (e) 10 Answer (c) 4 QO5 Suppose that a random sample of 10 adults is asked on the subject. What is the variance of the number of adults who think that protecting the environment should be given priority over developing energy supplies? (a) 0.24 · Answer (d)

Answer 1

3 required p= 2 3 = 0.667 i corresponding z score = 0.4316 143.2%.

14. n=10 P( who DO NOT think ) = for pootection = - -0.6 0.4 i. E(X)= hip lox0.4 = 14. = n=10 [5. no to vao(x)= np.Cl-p) = fox 0.6 x 0.4