Page 55 - Pharmaceutical Analytical Chemistry III
P. 55
➢The value of r ranges between ( -1) and ( +1)
➢The value of r denotes the strength of linear
association as illustrated.
➢As the value approaches the unity, we get a
strong linear correlation.
➢Notice that we need a good linear correlation
to construct our (regression) calibration
curve or plot for the estimation of the
unknown concentration.
