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8. A national car magazine says that it takes 15 minutes to change a tire. The manager at COUGAR MOTORS feel mechanics take less time.

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8. A national car magazine says that it takes 15 minutes to change a tire. The manager at COUGAR MOTORS feel mechanics take less time. A sample of 25 customers showed that it took the company 14.30 minutes to chang tire. The population standard deviation is 2 minutes. Using a 10% level of significance, do the mechanics take time? Use printscreen to show the results, indicate the relevant data on the Excel output, and state the conclusion

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