The file P09_01.xlsx contains a random sample of
100 lightbulb lifetimes. The company that produces
these lightbulbs wants to know whether it can claim
that its lightbulbs typically last more than 1000 burning hours.
a. Identify the null and alternative hypotheses for this
situation.
b. Can this lightbulb manufacturer claim that its
lightbulbs typically last more than 1000 hours at
the 5% significance level? What about at the 1%
significance level? Explain your answers
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