The possible number of correct responses, i.e. the values of grade variable, are all integers from...

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The possible number of correct responses, i.e. the values of grade variable, are all integers from 0 to 30 The expected value of grade is The variance of grade is Note: Use your judgment for rounding. The possible number of correct responses, i.e. the values of grade variable, are all integers from 0 to 30 The expected value of grade is The variance of grade is Note: Use your judgment for rounding.

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