This assumption was backed up with the linear regression of the rainfall
regression r-squared values. While none of the r-squared values were significant enough for
correlation, some were much higher fitting with the apparent correspondence. Figure 13 showed
that a positive slope for latitude fit very well for the r-squared values when ENSO was lagged 6
months. While there were three stations that were on the northern coast with positive regression
high r-squared values, Mayagüez sat on the NW part of Puerto Rico with a contradicting linear
regression slope but still a high r-squared value. However Figure 13 showed a slightly
significant trend of higher r-squared values east at the 6 month ENSO level, making the
Mayagüez station less important at this time lag. Rainfall averages from the months of March
and April show very slow progress of increased rainfall on the western coast of Puerto Rico
(Figure 19). This movement of higher rainfall averages may have something to do with a better
ENSO connection on the eastern side of Puerto Rico