AP Statistics Quiz
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PROBABILITY, RANDOM VARIABLES, AND PROBABILITY DISTRIBUTIONS
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A teacher defines XX as the number of questions a student answers correctly on a 10-question quiz selected at random from a large bank. Over many quizzes, the distribution of XX has mean μX=7.1\mu_X=7.1 and standard deviation σX=1.3\sigma_X=1.3. Which interpretation of the standard deviation is correct?
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