- (a) Give two reasons to justify the use of statistical models.
It has been suggested that there are 7 stages involved in creating a statistical model. They are summarised below, with stages 3 , 4 and 7 missing.
Stage 1. The recognition of a real-world problem.
Stage 2. A statistical model is devised.
Stage 3.
Stage 4.
Stage 5. Comparisons are made against the devised model.
Stage 6. Statistical concepts are used to test how well the model describes the real-world problem.
Stage 7.
(b) Write down the missing stages.