The Automobile Association of America claimed the average number of years car owners keep their car to be 7.1 years. A sample of 100 randomly selected car owners are surveyed. The output below shows the analysis based on the sample data.

	Sample Data	Hypothesized Mean
Mean	6.698	7.100
Variance	0.788	0.000
Observations	100	100
Hypothesized Mean Difference	0
df	99
t Stat	-4.531
P(Tt) one-tail	0.000
t Critical one-tail	1.660
P(Tt) two-tail	0.000
t Critical two-tail	1.984