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If 10 is added to every observation of a data set, which of the following stays unchanged?

Competition practiceStatistics
  • AMean
  • BMedian
  • CMode
  • DVariance

Step-by-Step Solution

Adding a constant shifts every average (mean, median, mode) by 10, but the deviations from the mean are unchanged, so the variance stays the same.
Answer: D) Variance

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