A company manufacturing computer chips finds that 8% of all chips manufactured are defective.In an effort to decrease the percentage of defective chips, management decides to provide additional training to those employees hired within the last year.After training was implemented, a sample of 450 chips revealed only 27 defects.A hypothesis test is performed to determine if the additional training was effective in lowering the defect rate.Which of the following statement is true about this hypothesis test?
A)It is a two tailed test about a proportion.
B)It is a one tailed test about a mean.
C)It is a one tailed test about a proportion.
D)It is a two tailed test about a mean.
E)None of the above.

Question

Quizplus · Accepted Answer

The hypothesis test is focused on determining if the proportion of defective chips has decreased due to the training, which makes it a one-tailed test about a proportion.

A Company Manufacturing Computer Chips Finds That 8% of All