Dependency between variables Clause Samples

Dependency between variables. Before investigating the impact of these variables on disease spread, we first study the correlation or dependency between these variables In the Figures below, when we say average, what we mean is that we bucket the data, average the y-­‐values in the bucket, and plot that. From Figure 6, we see a clear correlation between call frequency and call duration. This makes sense, because every call will have a positive call duration, so a higher call frequency will increase the number of total minutes spent calling. The call duration is thresholded at about 33,000 minutes, which focuses in on the pairs who talked on the phone for a realistic duration. 33,000 minutes corresponds to about an hour of talking to one person every day for a period of 18 months.