b. How is the new standard deviation related to the original standard deviation? A. The standard deviation is multiplied by the absolute value of that constant. B. The absolute value of that constant is added to the standard deviation. C. The standard deviation is divided by the absolute value of that constant. D. The absolute value of that constant is subtracted from the standard deviation
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Beyond the Answer
When you apply a constant to a data set, the relationship between the original standard deviation and the new standard deviation hinges on whether that constant is being multiplied or added. Specifically, if you multiply all data points by a constant, the new standard deviation is the original standard deviation multiplied by the absolute value of that constant. This means as the constant scales up or down, so does the variability of the data! In practical terms, understanding this relationship is crucial, especially when rescaling data in fields like statistics or machine learning. Whether you’re trying to normalize scores or modify features, keeping track of how the standard deviation shifts allows you to interpret your data accurately, ensuring that your models and analyses reflect the true variability of the underlying distributions.