The heights (in cm) of 15 boys are given below: 150,130,165, 162,152,130, 145, 148, 152, 155, 160, 156, 158, 145, 146. Find the mean height and median height of the boys.
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Solution-
(1) First arrange the series in ascending or descending order.
132 , 138 , 142 , 145, 145, 146, 148, 149, 150, 151, 158, 159 , 160 , 162 , 165 .
(2) Use formula to find median
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Note ...
If in any case class intervals are given or continuous series are given ,then used following formula to calculate median .
m = Median
n = No of items
CF = cumulative frequency
f = frequency
h =intervals or difference in class intervals
ll = Lower limits.
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