For the following situations, state appropriate null and alternative hypotheses. (a) The Census Bureau wants to determine whether the percentage of homeless people in New York City is the same as the national average. (b) A local hardware store owner wants to determine whether sales of garden supplies are better than usual after a spring promotion. (c) The Weather Channel wants to know whether average annual snowfall in the 1980s was signifi cantly different from the 8-inch average recorded over the past 100 years. (d) A consumer-products investigative magazine wonders whether the fuel efficiency of a new subcompact car is significantly less than the 34 miles per gallon stated on the window sticker.
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