Wax-com Electronics Inc.claims that a certain circuit board has a median operating life of less than 20,000 hours.A random sample of 25 such circuit boards showed 8 circuit boards failing before 20,000 hours and 17 circuit boards failing after 20,000 hours. Assume the useful life of the circuit board is not normally distributed.At $\alpha$ = .05,can it be concluded that the sample contradicts the claim of the company?
A)Reject the null hypothesis
B)Fail to reject the null hypothesis

Question

Quizplus · Accepted Answer

Since -1.6 > -1.645,failed to reject H₀.It appears that the claim of the company is not correct.The median operating life of the circuit board is not less then 20,000 hours.

Wax-Com Electronics Inc α\alphaα = 05,can It Be Concluded That the Sample Contradicts the Claim

Wax-Com Electronics Inc $\alpha$ = 05,can It Be Concluded That the Sample Contradicts the Claim