Difference between the standard deviation and the variance

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Do all data have a mean, median, or mode? Explain why or why not. When is the mean the best measure of central tendency? When is the median the best measure of central tendency? What is the difference between the standard deviation and the variance? In other words, do they provide different information or serve different purposes? Feel free to add examples to meet the word requirement.

Reference no: EM13924321

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