The grades for 30 students on the most recent exam are given in the data table below: Round your answer to 2 decimal places as needed 90 90 80 70 60 70 90 80 90 70 60 70 70 70 80 90 80 60 90 90 90 80 70 70 90 90 90 90 60 90 What is the mean score for the exam? What is the median score for the exam? What is the standard deviation for the exam?

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