aNOTE: A clueless student forgets to study for a quiz that contains 15 questions

Question

aNOTE: A clueless student forgets to study for a quiz that contains 15 questions. So he decides to answer each and every question by simply guessing the answer at random from among these choices: (A) (B) (C) (D) (E) Please answer the following 18 questions about this student. [#34] which Probability Distribution describes this clueless student's strategy? (A) Normal (B) Poisson (C) Binomial (D) None of these 1435] what is the probability that this student will get the right answer for any question (A) 1090 (B) 20% (C) 25% (D) 50% (E) None of thes

Explanation / Answer

34) binomial distribution describes this clueless student's strategy.

so, correct option is C.

35) probabaility of right answer= 1/5 = 20% as one answer must be right from 5 option.

so, correct option is B.

36) mean of binomial distribution = np.

here n=15 (number of trials)

p=1/5 ( probability of success)

so, mean=np= 15*1/5= 3

so, correct option is C.

37) In binomial distribution

variance= npq.

here q =4/5 (probability of failure)

so, variance=npq= 15*1/5*4/5= 2.400

so, correct option is B.

38) standard deviation= (2.400)1/2 = 1.549.

so, correct option is A.

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