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Biostatistics & Research · single question

Results of 5 dental students in an exam: 48, 56, 64, 66, 66. What is the MEDIAN and the MEAN?

  1. Median = 60, Mean = 64
  2. Median = 64, Mean = 60
  3. Median = 66, Mean = 62
  4. Median = 64, Mean = 64
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Correct answer: B. Median = 64, Mean = 60

  • A. Median=60, Mean=64 is reversed — mean is 60 and median is 64, not the other way.
  • B. Correct. MEDIAN: arrange in order → 48, 56, 64, 66, 66. With 5 values (odd number), the median is the MIDDLE value = 64. MEAN: (48+56+64+66+66)/5 = 300/5 = 60. Therefore: Median = 64, Mean = 60.
  • C. Median=66 is incorrect — 66 appears twice but the true middle value (3rd of 5) is 64.
  • D. Median=Mean=64 is incorrect — the mean is 60, not 64.

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