A quality expert inspects 380 items to test whether the popu

A quality expert inspects 380 items to test whether the population proportion of defectives exceeds 0.04, using a right-tailed test at ? = 0.02.

What is the power of this test if the true proportion of defectives is ? = 0.05? (Do not round intermediate calculations. Round your answer to 4 decimal places.)

What is the power of this test if the true proportion is ? = 0.06? (Do not round intermediate calculations. Round your answer to 4 decimal places.)

What is the power of this test if true proportion of defectives is ? = 0.07? (Do not round intermediate calculations. Round your answer to 4 decimal places.)

Solution

a) Power value = True value-hypotesised value

= 0.05-0.02 = 0.03

-------------------------------------

b) Power value = True value-hypotesised value

=0.06-0.02 = 0.04

-----------------------------------------------

c) Power value = True value-hypotesised value

=0.07-0.02 = 0.05