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A special coating is applied to several scale model engine nacelle body shapes to determine if it reduces the drag coefficient. The following data are the drag coefficient before the coating is applied and after.
Model
#1
#2
#3
#4
#5
#6
Before
0.782
0.656
0.541
0.250
0.323
0.888
After
0.668
0.581
0.532
0.241
0.334
0.891
Perform a hypothesis test to determine if there is evidence at the 0.05 level of significance to support the claim that the coating reduces the drag coefficient. What is the test value for this hypothesis test?
What is the P-value for this hypothesis test?
What is your conclusion for this test?
T est to see if the mean of the population is at least twelve ounces.
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