A teaching assistant gives a quiz to his section. There are 10 questions on the quiz and
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A teaching assistant gives a quiz to his section. There are 10 questions on the quiz and no part credit is given. After grading the papers, the TA writes down for each student the number of questions the student got right and the number wrong. The average number of right answers is 6.4 with an SD of 2.0. The average number of wrong answers is with an SD of
. Fill in the blanks—or do you need the data? Explain briefly. P-698
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