Normal approximation for the probability of guessing correct


Solve the below:

Q: Construct a table giving the binomial distribution for each of the following:

a) The probability of guessing correctly on a 10-question true-false test.

b) The probability of guessing correctly on a 20- question multiple choice test, with 4 alternatives per question.

c) For a 100-question true-false test, the normal approximation for the probability of guessing correctly

(1) between 0 & 20 correct,

(2) Between 21 & 40 correct,

(3) Between 41 & 60 correct,

(4) between 61 & 80 correct, and

(5) between 81 & 100 correct.

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Basic Statistics: Normal approximation for the probability of guessing correct
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