We want to test a manufacturers claim that the average life

We want to test a manufacturer\'s claim that the average life of its product is 100 hours (H0: µ = 100). There is evidence that the true average life of the product is less than the advertised claim. A hypothesis test was carried out on data collected on the life of the product with details given below. Which of the following significance levels would lead us to reject the manufacturer\'s claim? Test of mu = 100 vs < 100, p-value = 0.019 A. 0.2% B. 1% C. 5% D. 0.1%

Solution

we reject null when p-value < significance level, therefore above 1.9%

C. 5%