A psychologist researching anxiety wanted to see whether or not there was a relationship between severe generalized anxiety symptoms and sleep disturbance. He constructed two self-report scales and asked ten patients diagnosed with Generalized Anxiety Disorder (GAD) to complete them.

One scale measured the participant's level of generalized anxiety. A high score (out of 30) indicated high anxiety levels.

The other scale measured the level of sleep disturbance. A high score (out of 30) indicated severe sleep disturbance.

The two sets of results for each patient are shown in the table below.

Table 1: Anxiety score and sleep disturbance score for each patient

Patient	1	2	3	4	5	6	7	8	9	10
Anxiety score	5	7	8	11	12	15	18	20	22	25
Sleep disturbance score	15	6	11	8	17	10	22	14	23	21

Estimate the correlation coefficient most likely to result from analysis of the data in Table 1.

One scale measured the participant's level of generalized anxiety. A high score (out of 30) indicated high anxiety levels.

The other scale measured the level of sleep disturbance. A high score (out of 30) indicated severe sleep disturbance.

The two sets of results for each patient are shown in the table below.

Table 1: Anxiety score and sleep disturbance score for each patient

Patient	1	2	3	4	5	6	7	8	9	10
Anxiety score	5	7	8	11	12	15	18	20	22	25
Sleep disturbance score	15	6	11	8	17	10	22	14	23	21

Estimate the correlation coefficient most likely to result from analysis of the data in Table 1.

Data handling and analysis

Question 62

Markscheme

Data handling and analysis

Question 62

Markscheme

Data handling and analysis

Question 62

Data handling and analysis Questions

Data handling and analysis

Question 62

Data handling and analysis Questions