When 10 randomly selected car owners are surveyed, it is found that the mean length of time they plan to keep their car is 7.01 years, and the standard deviation is 0.74 years. Assume that times are normally distributed.
-How much evidence is there that the mean years is less than 7.5?
A)No evidence
B)Some evidence
C)Strong evidence
D)Very strong evidence
E)Extremely strong evidence

Question

Quizplus · Accepted Answer

If the confidence interval or the p-value is less than 0.05, there is strong evidence that the mean years is less than 7.5.

When 10 Randomly Selected Car Owners Are Surveyed, It Is