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A school assessment publisher has a pool of 300 classically parallel items to assess integrity and reports a reliability of .80 for the total score

A school assessment publisher has a pool of 300 classically parallel items to assess integrity and reports a reliability of .80 for the total score across the 300 items. Typically it takes 30 seconds to answer one item. A test administrator has 60 minutes to give a test composed of items from this pool to assess integrity. What will be the reliability for this assessment?

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