A tire manufacturer has a 60,000-mile warranty for tread life. The manufacturer considers the
overall tire quality to be acceptable if less than 8% are worn out at 60,000 miles.
Select one answer.
The manufacturer tests 250 tires that have been used for 60,000 miles. They find that 15 of them are worn out. With
this data, we test the following hypotheses at the 5% significance level.
H_(0) : The proportion of tires that are worn out after 60,000 miles is equal to 0.08 .
H_(a) : The proportion of tires that are worn out after 60,000 miles is less than 0.08 .
The p-value is 0.15 . Which conclusion is correct?
A. Fail to reject H_(0).
B. Accept H_(0).
C. Reject H_(0).
Question 6
Select one answer. A tire manufacturer has a 6o,ooo-mile warranty for tread life. The manufacturer considers the overall tire quality to be acceptable if less than 8% are worn out at 6o,ooo miles 10 points
The manufacturer tests 250 tires that have been used for 6o,0o0 miles. They find that 15 of them are worn out. With
this data, we test the following hypotheses at the 5% significance level.
H.: The proportion of tires that are worn out after 6o,ooo miles is equal to o.o8.
H : The proportion of tires that are worn out after 6o,0oo miles is less than o.o8.
The p-value is o.15. Which conclusion is correct?
A. O Fail to reject H.. B. O Accept H.- C. O Reject H.