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If a is the standard deviation of b, c, and d, what is the standard deviation of b + 3, c + 3, and d + 3, in terms of a?

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If <em>a</em> is the standard deviation of <em>b</em>, <em>c</em>, and <em>d</em>, what is the standard deviation of <em>b</em> + 3, <em>c</em> + 3, and <em>d</em> + 3, in terms of <em>a</em>?






 
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