Morphine was the first single-substance drug to be derived from a plant, in this case from the resin of the opium poppy (Papaver somniferum) by a German pharmacist named Setru â¦ rner, in 1803-1805. It was first sold commercially by Heinrich Merck in the 1820's.
1 To find percentiles outside of this range, use the PERCENTILE.INC function. The syntax on this function is exactly the same as for the PERCENTILE.EXC function.  If you will need this worksheet to run on versions of Excel prior to 2007, use PERCENTILE instead of PERCENTILE.EXC or PERCENTILE.INC.
A percentile, on the other hand, could be in between whole numbers of standard deviations from the mean, so the empirical rule wouldn't help you. For example, if you were looking for the 60th percentile, that corresponds to .253 standard deviations above the mean. The empirical rule won't help you there.