A set of test papers was machine scored. Later it was discovered that 2 points should be
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A set of test papers was machine scored.
Later it was discovered that 2 points should be added to each score. Student A said, “The mean score should also be increased by 2 points.” Student B added, “The standard deviation should also be increased by 2 points.”
Who is right? Justify your answer.
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Related Book For 
Just The Essentials Of Elementary Statistics
ISBN: 9780495314875
10th Edition
Authors: Robert Johnson, Patricia Kuby
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