An independent consumer group published its finding that the lifetimes of electric bulbs manufactured by BIG Corporation are approximately normally distributed with a mean of 660 days and a standard deviation of 123.5. BIG Corporation claims that the standard deviation of its electric bulbs is less than 123.5. 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. Ho: H₁: 0 μ ê OSO ローロ |x X a Р ロメロ S ロ<ロ >O ²0

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