An experiment was conducted to investigate the effect of sleep deprivation on memory recall. Four participants were tested under two conditions: after 8 hours of sleep and after 4 hours of sleep. The raw data is presented in the table below.
| Participant | Number of words forgotten after 8 hours of sleep | Number of words forgotten after 4 hours of sleep |
|---|---|---|
| P | 3 | 7 |
| Q | 8 | 11 |
| R | 5 | 14 |
| S | 6 | 19 |
Calculate the mean number of words forgotten after 4 hours of sleep.
You must give your answer to one decimal place.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, 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.
