STATISTICS: MEASURES OF CENTRAL TENDENCY : LSUS

FURTHER MATHEMATICS SSS1 FIRST TERM           

STATISTICS: MEASURES OF CENTRAL TENDENCY

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MEASUREMENT OF CENTRAL TENDENCY

  • Mean, Median and Mode of ungrouped
  • Mean, Median and Mode of grouped data

Measures of central tendency: This is a measure of how the data are centrally placed. The three commonest measures of position, depending on the information required are the arithmetic mean, median and mode.

MEAN: It is the most widely used measure and is sometimes called the arithmetical average. The mean of the number x1, x2, x3, x4 …………………xn is given by:

   X = ∑x   where ∑x is the sum of all items.     n = number of items

           n  

When the data involves frequency; mean = ∑fx/∑f

Examples:

1. Calculate the mean.... View More

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