# Edexcel Statistics S1 Formulae You Need to Remember

Formulae you will need to remember for the Edexcel AS Mathematics Statistics S1 6683 Specification.

- Created by: James
- Created on: 23-05-14 15:38

First 109 words of the document:

Formulae to Remember Statistics S1

x f x

Mean = x = n or f

(x2) x 2 (x2)

Variance = =2

n - ( n ) or n - (x)2

Standard Deviation = = V ariance

Interquartile Range (IQR) = Q3 - Q1

P(A') = 1 P(A)

For Independent Events P(B|A) = P(B)

A and B P(A|B) = P(A)

P(AB) = P(A) x P(B)

E (aX + b) = aE (X ) + b)

V ar(aX + b) = a2 V ar(X )

Cumulative Distribution P (X x0 ) = P (x)

Function F (x0)

Normal Random Variable Z = X -

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