Using the data in Table 2, calculate the standard deviation for the number of words recalled by the participants in the silent condition.
You must show your working and give your answer to two decimal places.
| Participant | Number of words recalled (out of 15) | (x−xˉ)(x - \bar{x})(x−xˉ) | (x−xˉ)2(x - \bar{x})^2(x−xˉ)2 |
|---|---|---|---|
| A | 5 | -3 | 9 |
| B | 11 | 3 | 9 |
| C | 12 | 4 | 16 |
| D | 8 | 0 | 0 |
| E | 9 | 1 | 1 |
| F | 8 | 0 | 0 |
| G | 6 | -2 | 4 |
| H | 5 | -3 | 9 |
| Total | 64 | Total | |
| Mean (xˉ\bar{x}xˉ) | 8 |
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.