A study examined the length of a certain species of fish from a lake. Length mea

Question

A study examined the length of a certain species of fish from a lake. Length measurements of a random sample of 100 fish were made. Summaries of these data are shown m the table below. Assuming that the difference in average enzyme level between treatment and control groups in Species 1 is statistically significant, which statement is most consistent with the data? The results do not suggest that the herbicide is a factor affecting enzyme levels. The results suggest that the herbicide is a factor affecting enzyme levels. The results suggest that the herbicide is the sole factor affecting enzyme levels The results suggest that the herbicide is a factor associated with enzyme levels but not causal.

Explanation / Answer

As the herbicide effect causes the fishes length to reduce in some fishes and increase in some fishes you cannot definetly say that the herbicide is a sole factor affecting the length. You can say just it is a factor that affects the enzyme levels but not causal.(As some fishes have longer lengths also ).

Hence option D

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