Determining null and alternative hypotheses 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 680 days and a standard deviation of 122. BIG Corporation claims that the standard deviation of its electric bulbs is less than 122. Suppose that we want to carry out a hypothesis test to see if BIG Corporation's claim is correct. State the null hypothesis , and the alternative hypothesis H that we would use for this test. H :] X P H :0 p S 00 020 0=0 0#0