9) A recent survey of gasoline prices indicated that the national average was $4.098 per gallon. The Dallas Automobile Club claimed that gasoline in Texas was significantly lower than the national average. A survey covering 10 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 should be used to test the claim using a = 0.01? 9) A) -1.26 B) -2.33 C) 2.33 D) 1.26 10) A test is made of Ho: M = 47 versus H1: M > 47. A sample of size n = 69 is drawn, and x = 48. The population standard deviation is = 27. Compute the value of the test statistic z. 10) A) 0.62 B) 0.31 C) 1.60 D) 0.04 11) A test of Ho: M = 41 versus H1: M