Table 1.

Population units organized in different sets.

Set-I					Set-II
S.No.	1	2	…	$k$	S.No.	1	2	…	$k$
1	$y_1$	$y_2$	…	$y_k$	k+1	$y_{kk+1}$	$y_{kk+2}$	…	$y_{kk+k=\left(k+1\right)k}$
2	$y_{k+1}$	$y_{k+2}$	…	$y_{2k}$	k+2	$y_{\left(k+1\right)k+1}$	$y_{\left(k+1\right)k+2}$	…	$y_{\left(k+2\right)k}$
3	$y_{2k+1}$	$y_{2k+2}$	…	$y_{3k}$	k+3	$y_{\left(k+2\right)k+1}$	$y_{\left(k+2\right)k+2}$	…	$y_{\left(k+3\right)k}$
$k$	$y_{\left(k-1\right)k+1}$	$y_{\left(k-1\right)k+2}$	…	$y_{kk}$	n-2	$y_{\left(n-3\right)k+1}$	$y_{\left(n-3\right)k+2}$	…	$y_{\left(n-2\right)k}$
Set-III
S.No.	1	2	…	k
n-1	$y_{\left(n-2\right)k+1}$	$y_{\left(n-2\right)k+2}$	…	$y_{\left(n-1\right)k}$
n	$y_{\left(n-1\right)k+1}$	$y_{\left(n-1\right)k+2}$	…	$y_{nk}$