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A recent survey of gasoline prices indicated that the national avedrage was $4.098 per gallon. The Dallas Automobile Club claimed that gasoline in Texas was significantly lower than the national average. A survey covering 0 different suburbs in Dallas found the average price of gasoline to be $3.924 per gallon with a population standard deviation of $0.053. What critical value shoiuld be used to test the claim using a = 0.01?

a) 1.26

b) 2.33

c) -1.26

d) -2.33

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