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Ho H1 W._vw An Independent consumer group published its nding that the lifetimes of electric bulbs manufactured by BIG Corporation are approximately normally distributed with

Ho H1

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W._vw An Independent consumer group published its nding that the lifetimes of electric bulbs manufactured by BIG Corporation are approximately normally distributed with a mean of 690 days and a standard deviation of 125. BIG Corporation claims that the standard deviation of its electric bulbs is less than 125. Suppose that we want to carry out a hypothesis test to see if BIG Corporation's claim is correct. State the null hypothesis Ho and the alternative hypothesis H1 that we would use for this test

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