🚆 StatisticsUnion Public Service Commission

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Syllabus

CDS Statistics chapters

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🚆 1 chapters, in order1 chapter
  1. Statistics and Basic Probability

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From the chapter: Statistics and Basic Probability

What is the mean of 12, 15, 18, 20 and 25?

Show the answer and why

Answer: B.

The sum is 12 + 15 + 18 + 20 + 25 = 90 and 90 / 5 = 18. The value 20 is the second-largest observation, not the mean, and 19 comes from a miscount of the total.

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