The national average price for regular gasoline was recently reported to be $3.29 per gallon. The standard deviation for the price of regular gasoline was $0.12. A random sample of 33 gas stations had an average price of $3.26
Which of the following statements is correct?A) The interval that contains 95% of the sample means is $3.17 and $3.41. Because the sample mean is between these two values, we have support that the average price for regular gasoline is $3.29.
B) The interval that contains 95% of the sample means is $3.20 and $3.38. Because the sample mean is between these two values, we do not have support that the average price for regular gasoline is $3.29.
C) The interval that contains 95% of the sample means is $3.23 and $3.35. Because the sample mean is between these two values, we do not have support that the average price for regular gasoline is $3.29.
D) The interval that contains 95% of the sample means is $3.25 and $3.33. Because the sample mean is between these two values, we have support that the average price for regular gasoline is $3.29.
D
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