The standard deviation is determined by first calculating the mean, then taking the difference of each control result from the mean, squaring that difference, dividing by n-1, then taking the square root.
The higher the heat level is th â¦ e faster the liquids evaporate. But if you leave something outside like syrup for sometime, it will take much more longer to evaporate since syrup has a substance so much thicker than water.
Some coolers have a âbleed-off valveâ to drain a. p o r tion of the re c i r culating water to prevent exces-. sive mineral buildup on the porous pads. Bleed-off. water can increase overall evaporative cooler water. use by 50% or more, which would increase total. evaporative cooler water use to 4,470 gallons per.