A test consists of 740 true or false questions of the student guesses on each question...

Question

Question

math Statistics-And-Probability

Answer 1

Answer #1

Solution:

Given:

A test consists of 740 true false questions. Thus n = 740

A student guesses on each answer.

Hence p = probability of correct answer = 0.5 and q = probability of incorrect answer = 0.5

We have to find standard deviation of number of correct answers.

It is given by:

0 = Vn X D X q

0 = 740 x 0.5 x 0.5

0 = 185

0 = 13.60147

0 = 13.60

Thus correct answer is :C . 13.60

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Answer 2

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