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

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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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Construct a 90%

confidence interval for the difference between the mean yields for the two types of fertilizer. Let 1

denote the mean yield for fertilizer A. Use the TI-84 Plus calculator. Round the answers to one decimal place.

The 90% confidence interval for the difference between the mean yields for the two types of fertilizer is < 1-2< .