The standard deviation for the table is Class 0-6 6-
12 12-18 18-24 24-30 Frequency 8 10 15 11 6
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Answer:
Step-by-step explanation:
xi=3,9,15,21,27
f=8,10,12,9,5
cf=8,18,30,39,44
N=∑fi=44
N2=22
medianclass=12→18
l=12,F=18,f=12,h=6
median=l+n2−Ff⋅h=12+22−1812⋅6=14
now, again in table
di=|xi−14|=1,5,1,7,13
fi⋅di=88,50,12,63,65
∑(fi⋅di)=278
mean deviation about median is∑(fi⋅di)N
27844=6.318
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