A fruit grower wants to test a new spray that a manufacturer claims will reduce the loss due to insect damage. To test the claim, the grower sprays 200 trees with the new spray and 200 other trees with the standard spray. The following data were recorded. New Spray Standard Spray Mean Yield per Tree x (Ib) 240 227 Variance s2 950 810 (a) Do the data provide sufficient evidence to conclude that the mean yield per tree treated with the new spray, µ, exceeds that for trees treated with the standard spray, µ,? Use a = 0.05. State the null and alternative hypotheses. Но: ("1 — М2) = 0 versus Ha: (µ1 – µ2) > 0 О Hо: (и1 — и2) %3D O versus Ha: (и1 - и2) + 0 О Hi: (и1 — М2) = 0 versus Ha: (H1 – µ2) < 0 Но: (и1 - м2) + O versus Ha: (и 1 - M2) %3D о Но: (11 — и2) 0 Find the test statistic and rejection region. (Round your answers to two decimal places. If the test is one-tailed, enter NONE for the unused region.) test statistic rejection region z < NONE

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A fruit grower wants to test a new spray that a manufacturer claims will reduce the loss due to insect damage. To test the claim, the grower sprays 200 trees with the new
spray and 200 other trees with the standard spray. The following data were recorded.
New Spray
Standard Spray
Mean Yield per Tree x (Ib)
240
227
Variance s2
950
810
(a) Do the data provide sufficient evidence to conclude that the mean yield per tree treated with the new spray, µ, exceeds that for trees treated with the standard
spray, µ,? Use a = 0.05.
State the null and alternative hypotheses.
Но: ("1 — М2)
= 0 versus Ha: (µ1 – µ2) > 0
О Hо: (и1 — и2) %3D O versus Ha: (и1 - и2) + 0
О Hi: (и1 — М2)
= 0 versus Ha: (H1 – µ2) < 0
Но: (и1 - м2) + O versus Ha: (и 1 - M2) %3D о
Но: (11 — и2) <O versus Ha: (и1 - M2) > 0
Find the test statistic and rejection region. (Round your answers to two decimal places. If the test is one-tailed, enter NONE for the unused region.)
test statistic
rejection region
z < NONE
Transcribed Image Text:A fruit grower wants to test a new spray that a manufacturer claims will reduce the loss due to insect damage. To test the claim, the grower sprays 200 trees with the new spray and 200 other trees with the standard spray. The following data were recorded. New Spray Standard Spray Mean Yield per Tree x (Ib) 240 227 Variance s2 950 810 (a) Do the data provide sufficient evidence to conclude that the mean yield per tree treated with the new spray, µ, exceeds that for trees treated with the standard spray, µ,? Use a = 0.05. State the null and alternative hypotheses. Но: ("1 — М2) = 0 versus Ha: (µ1 – µ2) > 0 О Hо: (и1 — и2) %3D O versus Ha: (и1 - и2) + 0 О Hi: (и1 — М2) = 0 versus Ha: (H1 – µ2) < 0 Но: (и1 - м2) + O versus Ha: (и 1 - M2) %3D о Но: (11 — и2) <O versus Ha: (и1 - M2) > 0 Find the test statistic and rejection region. (Round your answers to two decimal places. If the test is one-tailed, enter NONE for the unused region.) test statistic rejection region z < NONE
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