SOLUTION: BIG Corporation advertises that its light bulbs have a mean lifetime,mu of at least 2800 hours. Suppose that we have reason to doubt this claim and decide to do a statistical test
Algebra ->
Probability-and-statistics
-> SOLUTION: BIG Corporation advertises that its light bulbs have a mean lifetime,mu of at least 2800 hours. Suppose that we have reason to doubt this claim and decide to do a statistical test
Log On
Question 511793: BIG Corporation advertises that its light bulbs have a mean lifetime,mu of at least 2800 hours. Suppose that we have reason to doubt this claim and decide to do a statistical test of the claim. We choose a random sample of light bulbs manufactured by BIG and find that the mean lifetime for this sample is 2640 hours and that the sample standard deviation of the lifetimes is 650 hours. what are the Ho hypothesis and the Ha hypothesis that shouldbe used for this test? Answer by John10(297) (Show Source):
You can put this solution on YOUR website! Since we doubt the manufacture claim (at least 2800 hrs life time), we should use the left tailed test (against the claim). Thus the hypothesis test is:
Null hypothesis: Mu >= 2800
Alternative hypothesis: Mu < 2800
John10:)
