Five repeats give bubble counts of 12, 13, 12, 25 and 14. The 25 is anomalous. What is the mean without it?
Answer and explanation
Correct answer: B. 12.75
- Step 1: Remove the anomalous result: 12, 13, 12, 14.
- Step 2: Sum = 51, and 51 ÷ 4 = 12.75.
Answer
12.75.
Why not the others: 15.2: this includes the anomalous result. 13: this is the median of the values. 12: this is the mode.
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