[PDF] STATISTICS AND PROBABILITY 16-Apr-2018 STATISTICS AND

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(A) Main Concepts and Results

Statistics

Meaning of 'statistics", Primary and secondary data, Raw/ungrouped data, Range of data, Grouped data-class intervals, Class marks, Presentation of data - frequency distribution table, Discrete frequency distribution and continuous frequency distribution. •Graphical representation of data : (i)Bar graphs (ii)Histograms of uniform width and of varying widths (iii)Frequency polygons •Measures of Central tendency (a)Mean (i)Mean of raw data

Mean =

121
n i ni x xx xx nn where x 1 , x 2 , ..., x n are n observations.

STATISTICS AND PROBABILITY

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