BI-2178
Results tables
Biology · Secondary 4 · Medium · Results tables
A student tests antibiotic Y on bacteria. The diameters of the clear zones are 9 mm, 22 mm and 10 mm. He realises one result is inconsistent.
Which diameter is most likely to be the inconsistent result, and what should he do with it when calculating the mean?
Which diameter is most likely to be the inconsistent result, and what should he do with it when calculating the mean?
- 9 mm; always include it in the mean
- 10 mm; exclude it without repeating the experiment
- 22 mm; repeat that reading and exclude it if it is anomalous
- All three; discard the whole experiment and start again
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