Which of the following is not a characteristic of a binomial experiment? There is a sequence of identical trials. Each trial results in two or more outcomes. The trials are independent of each other. The probability of success is the same from one trial to another. p Analysis: A. Incorrect. Each trial results in two or more outcomes is not a characteristic. B. Correct. Each trial results in two or more outcomes is not a characteristic. C. Incorrect. Each trial results in two or more outcomes is not a characteristic. D. Incorrect. Each trial results in two or more outcomes is not a characteristic. ANSWER: B Ref: Section 6.2 The expected value, of a binomial probability distribution with trials and probability E(X), n of success is: p + n p np(1-p) np + - 1 n p Analysis: A. Incorrect. is the expected value, np E(X). B. Incorrect. is the expected value, np E(X). C. Correct. is the expected value, np E(X). D. Incorrect. is the expected value, np E(X). ANSWER: C Ref: Section 6.2 The variance of a binomial distribution for which = 100 and = 0.20 is: n p 100 80 20 16 Analysis: A. Incorrect. The variance is 80 B. The variance is 80 C. Incorrect. The variance is 80 D. Correct. ANSWER: D Ref: Section 6.2 Which of the following about the binomial distribution is not a true statement? The probability of success must be constant from trial to trial.
Which of the following is not a characteristic of a binomial experiment? There is a sequence of identical trials. Each trial results in two or more outcomes. The trials are independent of each other. The probability of success p is the same from one trial to another. Analysis: A. Incorrect. Each trial results in two or more outcomes is not a characteristic. B. Correct. Each trial results in two or more outcomes is not a characteristic. C. Incorrect. Each trial results in two or more outcomes is not a characteristic. D. Incorrect. Each trial results in two or more outcomes is not a characteristic. ANSWER: B Ref: Section 6.2 The expected value, E(X), of a binomial probability distribution with n trials and probability p of success is: n + p np(1-p) np n + p - 1 Analysis: A. Incorrect. np is the expected value, E(X). B. Incorrect. np is the expected value, E(X). C. Correct. np is the expected value, E(X). D. Incorrect. np is the expected value, E(X). ANSWER: C Ref: Section 6.2 The variance of a binomial distribution for which n = 100 and p = 0.20 is: 100 80 20 16 Analysis: A. Incorrect. The variance is 80 B. The variance is 80 C. Incorrect. The variance is 80 D. Correct. ANSWER: D Ref: Section 6.2 Which of the following about the binomial distribution is not a true statement? The probability of success must be constant from trial to trial.
0538479825_312310.docx