question archive 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
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
Subject:StatisticsPrice: Bought3
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.
