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Twenty-one different observations have a median of 34. Every observation larger than the median is increased by 6. By how much does the mean rise?

Competition practiceStatistics
  • A6
  • B3
  • C
  • D

Step-by-Step Solution

With 21 values the median is the 11th, so exactly 10 values lie above it. The total rises by , and the mean by wrongly counts 11 values.)
Answer: C)

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