Fertilizer:In an agricultural experiment, the effects of two fertilizers on the production of oranges were measured. Ten randomly selected plots of land were treated with fertilizer A, and 7

randomly selected plots were treated with fertilizer B. The number of pounds of harvested fruit was measured from each plot. Following are the results.

Fertilizer A
464	483	441	491	403
466	448	457	437	516

Fertilizer B
414	408	398	382	368
393	437

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Part 1 of 3

Explain why it is necessary to check whether the populations are approximately normal before constructing a confidence interval.

Since the sample size is (Choose one), it is necessary to check that the populations are approximately normal. Large or small?