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A test consists of 30 multiple choice​ questions, each with five possible​ answers, only one of which is correct. find the mean and the standard deviation of the number of correct answers. round the answers
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A test consists of 30 multiple choice​ questions, each with five possible​ answers, only one of which is correct. find the mean and the standard deviation of the number of correct answers. round the answers to the nearest hundredth.

User Tfa
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The standard deviation is 0.
User Qiang Xu
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