1)The summary analysis of test scores for selected samples of Introduction to Statistical Economics students who took the course from three different instructors are shown below.

Descriptives Table

Score

N

Mean

Std. Deviation

Instructor A

6

77.3333

9.97330

Instructor B

4

80.0000

16.95091

Instructor C

5

88.0000

5.70088

Jumlah/Total

15

81.6000

11.38169

ANOVA Table

Sources

Sum of Squares

df

Mean Square

F

Treatments

324.267

2

162.133

1.306

Error

1489.333

12

124.111

Total

1813.600

14

At = 0.05, is there a significant difference among the mean of the three group?