A psychologist investigated whether Cognitive-Behavioural Therapy (Group A) or Mindfulness-Based Stress Reduction (Group B) was more effective at reducing anxiety. Ten matched pairs of participants completed an anxiety questionnaire after completing their respective therapies, where higher scores indicate a greater reduction in anxiety.

Table 2: Reduction in anxiety scores for 10 matched pairs

	Cognitive-Behavioural Therapy (Group A)	Mindfulness-Based Stress Reduction (Group B)
Pair 1	12	15
Pair 2	8	8
Pair 3	14	10
Pair 4	5	9
Pair 5	11	6
Pair 6	7	7
Pair 7	16	11
Pair 8	9	12
Pair 9	13	8
Pair 10	12	10

Calculate the value of $S\,$ in this study. Show your workings.

Table 2: Reduction in anxiety scores for 10 matched pairs

	Cognitive-Behavioural Therapy (Group A)	Mindfulness-Based Stress Reduction (Group B)
Pair 1	12	15
Pair 2	8	8
Pair 3	14	10
Pair 4	5	9
Pair 5	11	6
Pair 6	7	7
Pair 7	16	11
Pair 8	9	12
Pair 9	13	8
Pair 10	12	10

Calculate the value of $S\,$ in this study. Show your workings.

Inferential testing (A-level only)

Question 39

Table 2: Reduction in anxiety scores for 10 matched pairs

Markscheme

Inferential testing (A-level only)

Question 39

Table 2: Reduction in anxiety scores for 10 matched pairs

Markscheme

Inferential testing (A-level only)

Question 39

Table 2: Reduction in anxiety scores for 10 matched pairs

Inferential testing (A-level only) Questions

Inferential testing (A-level only)

Question 39

Table 2: Reduction in anxiety scores for 10 matched pairs

Inferential testing (A-level only) Questions