A variable, XXX, has a normal distribution with mean 60
95% of the values of X X\,X lie between 45 and 75
Sketch a diagram to show this distribution.
Ross wants to find out how long it takes boys and girls in different year groups to complete jigsaw puzzles.
He collects the following information for each child.
| Gender |
| Year group |
| Number of pieces in the jigsaw puzzle |
| Time taken to complete the puzzle |
| Favourite subject |
Which of these variables is most likely to be modelled by a normal distribution? Give a reason for your answer.
Practise Edexcel GCSE Statistics The Normal Distribution with exam-style questions for Foundation and Higher tier. 1 question, matched to the Edexcel GCSE Statistics (1ST0) specification and written in Paper 1 and Paper 2 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.