Find the median from the given data:
x 5 10 15 20 25 30 35
f 4 7 8 6 5 2 1
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Step-by-step explanation:
class interval. f. cf
5 4 4
10 7 4+7=11
15 8 11+8= 19
20 6 19+6= 25
25 5 25+5=30
30 2 30+2= 32
35 1 32+1=33
l=15 f= 8 N= 33 h= 5 cf=11
median = l+ (N/2-cf / f) *h
= 15+ ( 33/2 -11/ 8) *5
= 15 + (16.5-11 / 8) *5
=15 + 5.5/8 x 5
= 15 + 27.5/8
= 15 +3.4375
= 18.4375
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