8.2.2. Brood development index (numerical example)

The numerical example is a factorial experiment in which the factor product has two levels (p): control level and test level. The factor repeated measures has five levels (q): before exposure, three days after exposure, seven days, fourteen days, and nineteen days after exposure. There are six hives (n) in each product modality. In this design, each hive is observed under one modality of the factor product. There are 6 independent hives in every treatment group. The number of hives is twelve (2 x 6). The statistical model has npq = 60 data: n = 6, p = 2; q = 5. Example data are reported in Table 9.

Table 9. Example of BFD values for a numerical example (see section 8.2.2.).

 

Before Exposure  

3 days after  

7 days after  

14 days after  

19 days after  

Total  

Control Group  

H1,1

1.0

1.9

3.7

3.8

4.7

15.1

H1,2

1.0

2.2

3.5

3.7

4.4

14.8

H1,3

1.0

2.1

2.7

2.9

3.2

11.9

H1,4

1.0

1.9

3.7

3.8

4.7

15.1

H1,5

1.0

1.8

3.0

3.6

4.5

13.9

H1,6

1.0

2.0

3.1

3.5

4.0

13.6

TOTAL

6.0

11.5

18.9

21.0

25.0

82.4

 

Test Group  

H2,1

1.0

1.5

2.5

3.1

3.8

11.9

H2,2

1.0

1.4

2.7

3.0

3.6

11.7

H2,3

1.0

1.7

2.0

3.3

3.5

11.5

H2,4

1.0

1.3

2.1

3.4

3.7

11.5

H2,5

1.0

1.5

2.5

3.0

3.9

11.9

H2,6

1.0

1.8

2.6

2.9

3.5

11.8

TOTAL

6.0

9.2

14.4

18.7

22.0

70.3

Total Groups

 

12.0

20.7

33.3

39.7

47.0

152.7

8.2.2.2. Interaction statistical analysis