Answers

2016-03-13T19:35:45+05:30
There are 56 observations.. And thus the median of positions 3rd and 4th wl b taken.. So x-2+x/2 = 16 2x-2/2=16 2(x-1)/2=16 x-1=16 x=17 So the other no is 15 So then the mean is 6+7+15+17+17+20/6 = 82/6 =13.6
2 4 2
2016-03-13T20:24:08+05:30
Median=16
total no. of observation=6 which is even
let n=6
median=n/2th +n/2+1th/2
=6/2th+6/2+1th/2
=3th+4th/2
since,third & fourth observation are:x-2 & x
so,x-2+x/2=16
2x-2/2=16
by cross multiplication ;
2x-2=32
2x=34
x=17
now,third observation=x-2=17-2=15
fourth observation=x=17
mean=6+7+15+17+17+20/6
=82/6=13.66(approx)
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