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1/28/11
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1/28/11 What happens to the mean of a dataset when you… …add a constant to all scores? The new mean is equal to the original mean plus the constant value. …subtract a constant from all scores? The new mean is equal to the original mean minus the constant value. …multiple all scores by a constant? The new mean is equal to the original mean times the constant value.
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1/28/11 What happens to the standard deviation if I… Add a constant to all scores? Adding a constant has no effect
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Unformatted text preview: • Subtracting a constant has no effect • Multiple all scores by a constant? • The new standard deviation will be equal to the absolute value of the constant times the original standard 1/28/11 Review: Practice examples 1. Calculate the mean, median, and mode for the following set of numbers? •. 15, 23, 23, 27, 28, 31, 32, 37 •. 2. What are the deviation scores for the set of numbers? 1/28/11 1/28/11...
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