Calculate the standard deviation for the participants undergoing Cognitive Behavioural Therapy (CBT) using the resilience scores data in Table 1. Show your working and give your answer to one decimal place.
Table 1: Resilience scores for 5 CBT participants
| Participant | Resilience score |
|---|---|
| A | 12 |
| B | 16 |
| C | 18 |
| D | 20 |
| E | 24 |
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.