Calculate the standard deviation for the participants undergoing the mindfulness-based intervention using the attention focus scores data in Table 1. Show your working and give your answer to one decimal place.
Table 1: Attention focus scores for 5 mindfulness participants
| Participant | Focus score |
|---|---|
| A | 15 |
| B | 21 |
| C | 25 |
| D | 27 |
| E | 32 |
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.