The mean score of a college entrance test is 500; the standard deviation is 75. The scores are normally distributed. What percent of the students scored below 320 and 350? Select one: a. 0.0146 b. 0.9690 c. 0.4772 d. 0.0082 e. 0.4918
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The z-score is calculated by subtracting the mean from the value and then dividing by the standard deviation. For 320, the z-score is (320-500)/75 = -2.4 For 350, the z-score is (350-500)/75 = -2 Show more…
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