HELP?
Mileage tests were performed to compare three different brands of unleaded gas.Four different automobiles were used in the experiment, and each brand of gas was used in each car until the mileage was determined.The results, in miles per gallon are in table below:
Automobile
Brand 1 2 3 4
A 20.2 18.7 19.7 17.9
B 19.7 19.0 20.3 19.0
C 18.3 18.5 17.9 21.1
a.Is there evidence of a difference in the mean mileage rating among the three brands of gasoline?Use α = 0.05
b.Form ANOVA table for this experiment
c.Form 99% confidence interval for difference between the milage of

Question

HELP? 
Mileage tests were performed to compare three different brands of unleaded gas.Four different automobiles were used in the experiment, and each brand of gas was used in each car until the mileage was determined.The results, in miles per gallon are in table below:
	Automobile
Brand	1	2	3	  4
A	   20.2  18.7	19.7  17.9
B	19.7  19.0 20.3 19.0
C	18.3	18.5	17.9	21.1
a.Is there evidence of a difference in the mean mileage rating among the three brands of gasoline?Use α = 0.05 
b.Form ANOVA table for this experiment 
c.Form 99% confidence interval for difference between the milage of