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A recent gasoline survey said that the national average price of gasoline was $1.498 a gallon. It was felt that gasoline in Texas was significantly lower than the national average. A survey of 10 different suburbs in Dallas, Texas found the average price of gasoline to be $1.474 a gallon with a standard deviation of $0.0526. Assume that gas prices are normally distributed. What is the p-value for the test?
2.A recent report from the American Medical Association claims that for the first time in 10 years, the average salary of psychiatrists was $189,121 with a standard deviation of $26,975. A researcher would like to see if this claim can be proven false. A random sample of 64 psychiatrists this year yielded an average salary of $198,630. What is the p-value for the test?
3.A recent study claims that business travelers spend an average of $41 per day on meals. An accountant thinks that the figure is actually higher. A sample of 16 business travelers found that they had spent an average of $44 per day with a standard deviation of $3.65. If the variable is normal, what is the p-value?
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