# S1 - MEI AS level notes

Here are some detailed notes that I typed up covering every chapter and worked examples!

Hope this helps!

- Created by: Eva-Mae Brazil
- Created on: 24-03-13 20:07

First 111 words of the document:

Statistics

Chapter 1: Exploring Data

Distribution Shapes

Normal Distribution Uniform Distribution Bimodal

Unimodal No mode

Symmetrical

Non symmetrical distribution is SKEWED

Positive Skew Negative Skew

Variables

Discrete

o Can only take particular values {e.g. family size or shoe size etc}

Continuous

o Can take any value in a range

Measure of central tendancy

i.e. averages etc.

"sigma" means "the sum of..."

x

Mean =

n = x

Median = ( n2

+1

) th value

Mode = most common value

Midrange = (highest value+2lowest value )

Frequency Tables

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