A statistician consulting for a state department of transportation conducts a study to see if the proportion of drivers who are intoxicated has decreased since last year.
H₀: The proportion is the same as last year
Ha: The proportion is less than last year.
The P-value of a significance test is greater than the significance level. She can conclude:
A) there is not enough evidence to reject the null hypothesis.
B) the test was too powerful.
C) the null hypothesis is true.
D) there is enough evidence to reject the null hypothesis.
E) the alternative hypothesis is true.

Question

Quizplus · Accepted Answer

Since the P-value is greater than the significance level, we fail to reject the null hypothesis. Therefore, there is not enough evidence to conclude that the proportion of intoxicated drivers has decreased since last year.

A Statistician Consulting for a State Department of Transportation Conducts