Answer
$µ_{Financial}=µ_{LG}\neµ_{Food}$
There is enough evidence to conclude that the mean P/E ratio for Food industry is higher than the mean P/E ratio for Financial and Leisure Goods industries.
Work Step by Step
In MINITAB, enter the Financial values in C1, the Food values in C2 and in C3 enter the Leisure Goods values.
Select Stat -> ANOVA -> One-Way
Select Response data are in a separate column for each factor level.
In Responses enter C1 C2 C3
Click Comparisons. In "Error rate for comparisons" enter 5. In "Comparison procedures assuming equal variances" select Tukey. In "Results" select the 3 options. Click OK.
Click Ok.
