A student records the following oxygen bubble counts per minute in a photosynthesis experiment: 12, 14, 13, 26, 13. Which value should be identified as anomalous and excluded before calculating the mean?

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Question

A student records the following oxygen bubble counts per minute in a photosynthesis experiment: 12, 14, 13, 26, 13. Which value should be identified as anomalous and excluded before calculating the mean?

Accepted Answer

26 — The value 26 is clearly anomalous — it is approximately double the other values (12, 13, 13, 14), which are tightly clustered. An anomalous result is one that does not fit the pattern of the other data and is likely due to experimental error. The mean of the remaining four values would be (12 + 14 + 13 + 13) ÷ 4 = 13.

Answer

26

Answer

12

Answer

13

Answer

14

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