matsh class 9th ch statistics introduction and main points
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average (or) mean=sum of all observations/total number of observations
eg: A cricket player scores 1,20,0,12,13,19,20,7 in 8 matches
so,mean=1+20+0+12+13+19+20+7/8=11.5
so,he mostly scores 11 or 12 runs per match
median=the middle most term is called median in a data
eg:1,0,9,7,8,89,90,32,12,13,43
here median=89
mode=the observation which reapetes more in a data is called mode
1,1,7,5,4,5,4,54,3,1,3,2,9,0,0
here 1 is the mode because it reapetes more times
bar graph,histogram,frequency,pie charts,tally marks etc
eg: A cricket player scores 1,20,0,12,13,19,20,7 in 8 matches
so,mean=1+20+0+12+13+19+20+7/8=11.5
so,he mostly scores 11 or 12 runs per match
median=the middle most term is called median in a data
eg:1,0,9,7,8,89,90,32,12,13,43
here median=89
mode=the observation which reapetes more in a data is called mode
1,1,7,5,4,5,4,54,3,1,3,2,9,0,0
here 1 is the mode because it reapetes more times
bar graph,histogram,frequency,pie charts,tally marks etc
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