# Maths Unit 1 Edexcel

Rough guide, some topics not on because notes are made separately.

- Created by: Rachel
- Created on: 26-04-11 17:21

First 187 words of the document:

Unit 1 GCSE Maths

Statistics:

Methods of Sampling

See sheet attached to this page.

Stratified sampling

Example

2000 small caps

4000 medium caps

3000 large caps

1000 extra large caps

Total= 10000

Sample= 50

Small= 2000 x 50 = 10 caps

10000

Medium= 4000 x 50= 20 caps

10000

Large= 3000 x 50= 15 caps

10000

Ex Large= 1000 x 50= 5 caps

10000

In General:

No. to Take= subgroup size x sample size

Total

Discrete Data

Is any data which can only take a value from a given list. This is counted e.g. siblings.

Continuous Data

Is any data which can take any value in a given range. This is measured. E.g. weight (can get more

accurate)

Quantitative Data

Above are both types of this data, measured or counted.

Qualititive Data

Data about properties.

Mean

Average

Add up data, divide by how many values

Mode

Most common

Most occurring value

Median

Middle in range

Middle value once ordered

Range

Difference between highest and lowest.

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