Solution for QID #11145: A car manufacturer, Swanson, claims that the mean lifetime o | StudyHelpMe

A car manufacturer, Swanson, claims that the mean lifetime of one of its car engines is greater than 220,008 miles, which is the mean lifetime of the engine of a competitor. The mean lifetime for a random sample of 28 of the Swanson engines was x = 226,450 miles with a standard deviation, s, of 11,504 miles. Test the Swanson's claim using a significance level of α = 0.05.   A. P-value = 0.00314 < 0.05, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,008 miles.   B. P-value = 0.00629 < 0.05, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,008 miles.     C. P-value = 0.00414 < 0.05, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,008 miles.   D. P-value = 0.00669 < 0.05, reject the null hypothesis. There is enough evidence to conclude that the mean lifetime of this car engine is greater than 220,008 miles.