★ A survey regarding the heights (in cm) of 51 girls of Class X of a school was conducted and the following data was obtained :-
Find the median height.
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⠀⠀⠀━━A survey regarding the heights (in cm) of 51 girls of Class X of a school was ⠀⠀⠀⠀⠀⠀⠀conducted and the following data was obtained :-
⠀⠀⠀⠀⠀Find the median of Height .
⠀⠀⠀⠀⠀━━━━━━━━━━━━━━━━━━━⠀
⠀⠀⠀⠀❍ Finding Median of Height :
⠀⠀⠀⠀⠀━━━ Now Finding Cumulative Frequency [ CF ] :
[ Note : The letters in bold are median class . ]
Here ,
n is the total of all Frequency = 51
l is the lower - limit of the Median class = 145
h is the class - interval = 145 - 140 = 5
cf is the Cumulative Frequency of the class before median class = 11
f is the Frequency of the median class = 18
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