  In this paper, we first introduce the explicit analytical formulas for the
expected values of the Gutman and Schultz indices for a random cyclooctane
chain COCn. Meanwhile, the explicit formulas of the variances of the Gutman and
Schultz indices for a random cyclooctane chain are determined and we prove
these two indices are asymptotically subject to normal distribution.
Furthermore, we are surprised to find the variances of Kf*(COCn) and Kf+(COCn)
for a random cyclooctane chain based on the known results of others' paper and
they are asymptotically subject to normal distribution.
