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A car manufacturer, Swanson, claims that the mean lifetime of one of its car engines is greater than 2 2 0 , 0 0 1

A car manufacturer, Swanson, claims that the mean lifetime of one of its car engines is greater than 220,001 miles, which is the mean lifetime of the engine of a competitor. The mean lifetime for a random sample of 23 of the Swanson engines was x =226,450 miles with a standard deviation, s, of 11,502 miles. Test the Swanson's claim using a significance level of =0.02.
A.
P-value =0.00670<0.02, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,001 miles.
B.
P-value =0.00431<0.01, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,001 miles.
C.
P-value =0.01341<0.05, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,001 miles.
D.
P-value =0.02670<0.05, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,001 miles.

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