1 a fruit grower sprays 200 trees with a new spray and 200, Ask an Expert

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1. A fruit grower sprays 200 trees with a new spray and 200 other trees with a standard spray to protect against insect damage. The following data were recorded:

	New spray	Standard spray
Mean yield per tree (kg)	109	103
Variance	445	372

a) Obtain the p-value for testing if the new spray has significantly increasedmean yield per tree compared to the standard spray, and obtain a 95% two-sided confidence interval for the difference between mean yields.

b) Find the sample size required to obtain a 95% confidence interval having width = 1kg.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9992248

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