Calculates almost every statistic of a linear regression: the slope and
intercept of the line, the standard error on each, the correlation coefficient,
the coefficient of determination, also known as r-square, and an ANOVA table as
described in the manual.
This function takes two equal-length sequences of raw data. Note that the
dependent variable, as always, comes first in the argument list. If you don't
need all this information, consider using the
functions, which do less computation.
You should first look at your data with a scatter plot to see if a linear model
is plausible. See the manual for a fuller explanation of linear regression