Statistics Formulae

download

of 2

  • date post

    09-Feb-2016
  • Category

    Documents
  • view

    1
  • download

    0

Embed Size (px)

description

set of statistics formula

transcript

  • STATISTICS FORMULAE MEASURES OF CENTRAL TENDENCIES (MEAN, MEDIAN AND MODE)

    MEAN MEDIAN MODE UNGROUPED DATA ARITHMETIC MEAN (AM) = GEOMETRIC MEAN (GM) = !. !. ! !! HARMONIC MEAN (HM) = 1 1 = 1

    UNGROUPED DATA = + 12 !!

    UNGROUPED DATA Most frequently occurring value Or = 3 2

    GROUPED DATA ARITHMETIC MEAN (AM) = f

    GROUPED DATA = + 2

    GROUPED DATA = + !! + !

    MEASURES OF DISPERSION / VARIABILITY

    RANGE = !"#$% !"#"$ !""#$ !"#"$ MEAN DEVIATION UNGROUPED DATA: = GROUPED DATA: = f

    STANDARD DEVIATION UNGROUPED DATA: ( ) = !n GROUPED DATA: ( ) = !

    INTER-QUARTILE RANGE = 25th percentile 75th percentile CO-EFFICIENT OF VARIATION: = SDMean 100 100