1. A computer-implemented method for determining change points in network traffic data based on evaluating time-series data associated with the network traffic data, the method comprising: receiving, by a computing device over a network connection, a signal that identifies magnitudes of the network traffic data on a network over time; selecting, using the computing device, a first potential change point in the signal; identifying, using the computing device, a first portion of the signal incorporating data points before the first potential change point; determining, using the computing device, a first cumulative distribution function estimate for the first portion of the signal; identifying, using the computing device, a second portion of the signal incorporating data points after the first potential change point; determining, using the computing device, a second cumulative distribution function estimate for the second portion of the signal; determining, using the computing device, a normalized difference of the first and second cumulative distribution function estimates of the respective first and second portions of the signal; and determining, using the computing device, whether the first potential change point qualifies as a valid data traffic magnitude change point based on the normalized difference.