Three different pesticides can be used to control pest infestation of grapes. It is suspected that pesticide
Question:
If μi is the true mean yield after treatment with the ith pesticide, you are interested in the quantity μ = ½(μ1 + μ2) μ3 which measures the difference in mean yields for pesticides 1 and 2 and pesticide 3. If the sample sizes ni are large, the estimator (say, μ) obtained by replacing each individual μi by Xi is approximately normal.
(a) Find an approximate 100(1 x)% large-sample confidence interval for μ.
(b) Do these data support the claim that pesticide 3 is more effective than the other two? Use α = 0.05 in determining your answer.
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Related Book For
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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