Statistics 1 OCR formulae/equation

Equations and formulae for statistics 1. Includes permutations and combinations, correlation, variance, standard deviation and variance. 

HideShow resource information
  • Created by: Becky
  • Created on: 10-04-13 18:54
Preview of Statistics 1 OCR formulae/equation

First 128 words of the document:

Formulas/Equations for Statistics 1
Correlation
Is between -1 (strong negative) and 1 (strong positive)
R= SXY
(SXX)(SY Y )
SXX = xi2 - 1 2
n( xi)
SYY = yi2 - 1 2
n( yi)
SXY = xiyi - 1
n xi yi
Expectation = xipi
Variance = x2 - [(x)]2
2
Standard Deviation = 1 2
n xi - x
Permutations and Combinations
Number of ways of arranging objects = n!
p!
n!
Number of ways of arranging objects when more than one is alike = p!q !r!
Number of permutations for an ordered arrangement of r objects from n unlike objects = n!
(n-r)!
Number of combinations of r objects from n unlike objects = n!
r!(n-r)!

Comments

No comments have yet been made

Similar Mathematics resources:

See all Mathematics resources »See all resources »