A recent gasoline survey said that national average price of gasoline was $3.79 a gallon. It is felt that gasoline in Texas is different from the national average. A survey of 10 different suburbs in Dallas, Texas found the average price of gasoline to be $3.55 a gallon with a standard deviation of $0.19. Using a 0.10 significance level, test the claim that the average gasoline price per gallon in Texas is less than the national average of $3.79 per gallon.
(a). Identify the claim and state the hypotheses.
(b) Find the critical value(s) using the appropriate.
(c) Compute the test statistics
(d) Make the decision
(e) Summarize the results.