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A student investigates the effect of light intensity on the rate of photosynthesis - OCR Gateway - GCSE Biology - Question 7 - 2022 - Paper 1
Question 7
A student investigates the effect of light intensity on the rate of photosynthesis. They count the number of gas bubbles released by a plant under water. The table s... show full transcript
Worked Solution & Example Answer:A student investigates the effect of light intensity on the rate of photosynthesis - OCR Gateway - GCSE Biology - Question 7 - 2022 - Paper 1
Step 1
Which number could be classed as anomalous (an outlier)?
Answer
To identify an outlier in the data, we need to look for values that are significantly different from the others.
The recorded number of gas bubbles for low light intensity is 6, 7, and 8, with 6 being notably lower than the other values. For medium light intensity, the values are 10, 10, and 11, all closely grouped. Finally, for high light intensity, the values are 13, 19, and 14, where 19 is significantly higher than the others.
Among the options provided, the number 19 is the most disproportionate when compared to its surrounding values for high intensity.
Thus, the answer should be D 19, as it is the anomalous value in the context of the dataset.