A test consists of 250 true or false questions. If a student guesses on each question what is the standard deivation of the number of correct answers? A test consists of 250 true or false questions. If a student guesses on each question what is ?
he would get about 50% so 125 questionsA test consists of 250 true or false questions. If a student guesses on each question what is ?
Well, you can only go right or wrong on each question... therefore, you have a 50% chance of getting them right. Just divide 250 by 2 and that will be 125.
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