1. State the null and alternative hypotheses. Determine whether the type of test to be used is left-tailed, right-tailed, or two-tailed. a. A consumer analyst reports that the mean life of a certain type of automobile battery is s) not 74 months. b. An electronics manufacturer publishes that the variance of the life of its home theater system is less than or equal to 2.7. c. Arealtor publicizes that the proportion of homeowners who feel their house is too small for their family is more than 24%. d. A car dealership announces that the mean time for an oil change is less than 15 minutes. e. A company advertises that the mean life of its furnaces is more than 18 years.

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