Dr. Aris decided to use the standard deviation as a measure of dispersion for her memory recall data.
Calculate the standard deviation for the number of acoustically similar words recalled correctly shown in Table 3.
You must show your working and give your answer to two decimal places.
Table 3
| Participant | Number of acoustically similar words recalled correctly (xxx) | (x−xˉ)(x - \bar{x})(x−xˉ) | (x−xˉ)2(x - \bar{x})^2(x−xˉ)2 |
|---|---|---|---|
| A | 6 | -0.25 | 0.06 |
| B | 7 | 0.75 | 0.56 |
| C | 5 | -1.25 | 1.56 |
| D | 8 | 1.75 | 3.06 |
| E | 6 | -0.25 | 0.06 |
| F | 5 | -1.25 | 1.56 |
| G | 6 | -0.25 | 0.06 |
| H | 7 | 0.75 | 0.56 |
| Total | 50 | Total | |
| Mean xˉ\bar{x}xˉ | 6.25 |
186 exam-style questions on Edexcel A Level Psychology Research methods and skills, covering Research methods and skills. Each one has a worked solution and a mark scheme showing where the marks go.