Table 6 Multiple comparisons between grades for categories A and B.

From: The selections and differences in mathematical problem-posing strategies of junior high school students

Dependent Variable

Grade (I)

Grade (J)

Mean Difference (I-J)

Std. Error

Sig. *

Overall A

7

8

−0.320

0.189

0.206

9

−0.266

0.154

0.193

8

9

0.054

0.197

0.959

A1 (Accepting the given information)

7

8

−0.124

0.117

0.289

9

−0.296*

0.120

0.014

8

9

−0.172

0.119

0.148

A2 (Changing the given information)

7

8

−0.416*

0.101

0.000

9

−0.123

0.089

0.353

8

9

0.293*

0.102

0.011

A21 (Changing the initial information)

7

8

−0.416*

0.097

0.000

9

−0.123

0.100

0.220

8

9

0.293*

0.099

0.003

A22 (Changing the implicit assumptions)

7

8

0.219*

0.028

0.000

9

0.153*

0.029

0.000

8

9

−0.067*

0.029

0.022

Overall B

7

8

0.535*

0.117

0.000

 

9

−0.074

0.121

0.541

8

9

−0.609*

0.120

0.000

B1 (Symmetry)

7

8

0.132*

0.033

0.000

 

9

0.104*

0.034

0.002

8

9

−0.028

0.034

0.411

B2 (Systematic variation)

7

8

0.219

0.073

0.003

 

9

0.067

0.075

0.376

8

9

−0.152*

0.074

0.041

B3 (Chaining)

7

8

0.184*

0.077

0.017

 

9

−0.245*

0.079

0.002

8

9

−0.429*

0.078

0.000

  1. *p = 0.05.