In 1995, the average 2-week-advance-purchase airfare between Raleigh-Durham, North Carolina, and New York City was $235. The population standard deviation was $68. A1996 survey of 90 randomly chosen travelers between these two cities found that they had paid $218.77, on average, for their tickets. Did the average airfare on this route change significantly between 1995 and 1996? What is the largest α at which you would conclude that the observed average fare is not signifi cantly different from $235?
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