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Elementary Statistics Flashcards
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Formula
For even number of observations, median = average of two middle values after sorting...?
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Answer
For even number of observations, median = average of two middle values after sorting.
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Formula
Mean of combined groups = ?
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Answer
(n1×A1 + n2×A2) / (n1+n2). Weighted mean formula.
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Formula
If all values increase by k, mean and median also increase by k...?
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Answer
If all values increase by k, mean and median also increase by k. Mode increases by k too.
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