# Maths Chapter 1

- Created by: BethXAlston
- Created on: 22-09-19 13:25

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- Chapter 1
- Rounding to Significant Figures
- Zeros are only counted as a significant figure if they are between to non-zero numbers!
- To count the number of Significant Figures a number has, you start counting at the first non-zero number and stop counting at the last non-zero number
- For Example: 273 has 3 significant figures. 0.273 also has 3 significant figures. But 270 has 2 significant figures.

- Estimating
- When asked to estimate we must make sure we round each number to one significant figure

- Bounds
- Discrete and Continuous Data
- Discrete Data
- Examples of Discrete Data
- Shoe Size
- Attendance at a Sports Game
- Number of Animals at a Zoo

- These are discrete because you can't have half an animal or half a person. You can have half a shoe size but you can't have size 5.2
- Not every possible number can be used in Discrete Data.

- Examples of Discrete Data
- Continuous Data
- Examples of Continuous Data
- Time
- Distance
- Mass

- All possible numbers can be used in Continuous Data
- The length of a line could be measured as 7.236. A person could always run a fraction of a second faster.

- Examples of Continuous Data

- Discrete Data

- Discrete and Continuous Data

- Rounding to Significant Figures

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