The following sample data represents the final grades of students last trimester in the course STT101A from three sections taught by the same teacher. The teacher wants to know if the mean final grades from the three sections are the same using a 0.05 level of significance A B C O 4 2.5 2.5 3.5 3 1.5 3.5 3 1 3 4 O 4 2.5 3 3.5 [Select ] What is the appropriate test statistic? [ Select ] What is the appropriate decision and conclusion?3 O 4 2.5 1 3 3.5 [ Select ] What is the appropriate test statistic? [ Select ] What is the appropriate decision and conclusion? [ Select ] Is there a need for a Tukey-Kramer procedure? Why? [ Select ] What is the appropriate q-statistic value? [ Select ] Which population group is statistically different from the others