Big corporation advertises that its light bulbs have a mean lifetime, 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 ind that the mean lifetime for this sample is 2020 hours and
that the sample standard deviation of the lifetimes is 50 hours
based on this information, answer the questions below.
what are the null hypothesis (h) and the alternative hypothesis
that should be used for the test?
hot his greater than or equal to
is less than
12800
2800
h
in the context of this test what is a type terror
the hypothesis that
when
a type 1 error is?
fact, is?
suppose that we decide to reject the null hypothesis. what sort of error might we be makinolypell
explanation
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