QUESTION 2 The real estate assessor for a county government wishes to study various characteristics concerning single-family houses in the county. A random sample of 700 houses resulted in a mean heated area for the house of 1800 sq. ft. with a standard deviation of 400 sq. ft. In addition, it was learned that 420 of the 700 houses had central air conditioning. Suppose that, using this data, a statistical hypothesis test is conducted to determine if there is sufficient evidence that the proportion of all houses in the county with central air conditioning is different from .50. If it represents the proportion of all houses in the county with central air conditioning, the correct alternative hypothesis is a. <.50 b. n.50 c>.50 d. n.50