Sometimes statistical findings are linked so that it appears that two separate trends are related. Keep an eye out for this misleading technique, known as spurious correlation.
"...the time may not be very remote when it will be understood that for complete initiation as an efficient citizen of one of the new great complex world-wide states that are now developing, it is as necessary to be able to compute, to think in averages and maxima and minima, as it is now to be able to read and write."
- H.G. Wells, Mankind in the Making, 1903.