S1 January 2006 Q5
5.
(a) Write down two reasons for using statistical models. (2)
(b) Give an example of a random variable that could be modelled by
(i) a normal distribution,
(ii) a discrete uniform distribution. (2)
| Scheme | Marks |
|---|---|
| To simplify a real world problem To improve understanding / describe / analyse a real world problem Quicker and cheaper than using real thing To predict possible future outcomes Refine model / change parameters possible | B1B1 |
| (2) |
Notes
B1B1 Any 2
| Scheme | Marks |
|---|---|
| (i) e.g.s height, weight (ii) score on a face after tossing a fair die | B1B1 |
| (2) | |
| (4 marks) |