Concept check: Standard deviation (article) | Khan Academy
https://www.khanacademy.org/math/statistics-probability/summarizing-quantitative-data/variance-standard-deviation-population/a/concept-check-standard-deviation
Web ResultPart 1. Consider the simple data set { 1, 4, 7, 2, 6 } . How does the standard deviation change when 7 is replaced with 12 ? Choose 1 answer: It increases. A. It increases. It stays the same. B. It stays the same. It decreases. C. It decreases. How can we see this in the formula for standard deviation? [Explain] Part 2.
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