Got a link to some?
Two examples of the use of statistics by evolutionary biologists & paleontologists jump to the front of my mind.
The most obvious example (to me), though not about biological evolution per se, is radiometric dating, in which the addition of statistical errors from various isotope dating techniques is used to help establish the age of the earth and fossil strata in general. In some cases, a statistical error of distribution less than 0.1% is possible in rocks that are hundreds of millions of years old.
Statistical distributions are also commonly used in the study of genetics as it relates to evolution; one recent example was in the study of mutation accumulations in the 'junk' DNA of primates. The concept of statistical distributions in genetics is also behind the principle of genetic drift.
Statistics is an omnipresent factor in almost all experimental science, whether one realizes it or not. Usually, finished articles in the news & magazines intended for general public perusal don't go into the details of the months/years spent by scientists dealing with the statistics of their research, but they are always being dealt with to minimize uncertainties in data.