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Edexcel Maths Statistics Definition > S1 Important Info > Flashcards

Flashcards in S1 Important Info Deck (8)
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1

What is a mathematical model?

Simplification of a real world situation

2

What are mathematical models used for?

-To make predictions about real world problem.

-By analysing model, improved understanding of situation obtained

3

List 5 advantages to mathematical models

- Quick & easy to produce

- Simplifies complex situation

- Improve understanding of real world as certain variables can readily be changed

- Enables us to make predictions

- Provides control

4

Give 2 reasons why mathematical models should be treated with caution.

- Simplification - doesn't include all aspects of problem

- Model may only work in certain situations

5

Briefly outline steps for making a mathematical model [7]

1) Real world problem observed

2) Mathematical model devised

3) Model used to make predictions

4) Experimental data collected from real world

5) Predicted & observed outcomes compared

6) Statistical test used to asses how well model describes real world

7) Mathematical model refined (if necessary) to improve match between expected and observed values

6

Define mutually exclusive

When events have no outcomes in common

7

In stats, what does the term independent mean?

When one event has no effect on the other

8

When might a normal distribution be appropriate?

When there is little/no skew in data