Ononot — A dataset S has 10 observations with a sample mean of 50. If

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Descriptive Statisticshard

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A dataset $S$ has 10 observations with a sample mean of 50. If we create a new dataset $S'$ by adding two new observations, both exactly equal to 50, how does the sample variance of $S'$ ( $s_{S'}^2$ ) compare to the sample variance of $S$ ( $s_S^2$ )?