SOURCE

Degree of Freedom

(DF)

Alias

Sum of Squares

(SS)

Mean of Squares

(MS)

F-value

F-critical

$X_1$ (Stove type)

1

$X_2{X}_3{X}_4$

8.7

8.7

6.96

4.54

$X_2$ (Fuel type)

1

$X_1{X}_3{X}_4$

11.4

11.4

9.07

4.54

$X_3$ (fuel load)

1

$X_1{X}_2{X}_4$

0.0

0.0

0.02

4.54

$X_4$ (fan)

1

$X_1{X}_2{X}_3$

4.8

4.8

3.85

4.54

$X_1{X}_2$

1

$X_3{X}_4$

3.9

3.9

3.11

4.54

$X_1{X}_3$

1

$X_2{X}_4$

1.6

1.6

1.29

4.54

$X_1{X}_4$

1

$X_2{X}_3$

2.1

2.1

1.71

4.54

$X_1{X}_2{X}_3{X}_4$

1

(1)

0.0

0.0

0.00

4.54

ERROR

15

18.9

1.3

TOTAL

23

51.5