Spraying Fruit Trees A fruit grower wants totest a new
Chapter 9, Problem 71(choose chapter or problem)
Spraying Fruit Trees A fruit grower wants totest a new spray that a manufacturer claims will reducethe loss due to insect damage. To test the claim, thegrower sprays 200 trees with the new spray and200 other trees with the standard spray. The followingdata were recorded:New Spray Standard SprayMean Yield per Tree x (lb) 240 227Variance s2 980 820 a. Do the data provide sufficient evidence to concludethat the mean yield per tree treated with the newspray exceeds that for trees treated with the standardspray? Use a .05.b. Construct a 95% confidence interval for the differencebetween the mean yields for the two sprays.
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