You want to know which of two manufacturing methods will be

You want to know which of two manufacturing methods will be better. You create ten prototypes using the first process, and ten using the second. There were three defectives in the first batch and five in the second. The 90% confidence interval for the difference in the two proportions is (–0.493, 0.159). What conclusion should you make about the two manufacturing processes?
	The second method is better. The first method is better. Both methods are equivalent.

You want to know which of two manufacturing methods will be better. You create ten prototypes using the first process, and ten using the second. There were three defectives in the first batch and five in the second. The 90% confidence interval for the difference in the two proportions is (–0.493, 0.159). What conclusion should you make about the two manufacturing processes?
	The second method is better. The first method is better. Both methods are equivalent.

Solution