Question 428041: In low-speed crash tests of five SMART cars, the repair costs were computed for a factory-authorized repair center and an independent repair facility. The results are listed in the accompanying table.
a. Is there sufficient evidence to support the claim that the independent center has lower repair costs? Use a 0.05 significance level.
Authorized repair center $797 $571 $904 $1,147 $418
Independent repair center $523 $488 $875 $911 $297
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! In low-speed crash tests of five SMART cars, the repair costs were computed for a factory-authorized repair center and an independent repair facility. The results are listed in the accompanying table.
a. Is there sufficient evidence to support the claim that the independent center has lower repair costs? Use a 0.05 significance level.
Authorized repair center $797 $571 $904 $1,147 $418
Independent repair center $523 $488 $875 $911 $297
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Ho: ua-ui = 0
Ha: ua-ui > 0
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I ran a 2 Sample T-test on the data and got the following:
test stat: t = 0.8543
p-value = 0.2090
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df = 7.9590
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Since the p-value is greater than 5%, fail to reject Ho.
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Cheers,
Stan H.
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