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.
Quartiles are percentiles that divide the data into fourths. A quartile is a number, it is not a range of values. A value can be described as above or below the first quartile, but a value is never in the first quartile. Consider: Check out this five statistical summary for a set of tests scores.uartiles are percentiles that divide the data into fourths. A quartile is a number, it is not a range of values. A value can be described as above or below the first quartile, but a value is never in the first quartile. Consider: Check out this five statistical summary for a set of tests scores.