Question

Spray drift is a constant concern for pesticide applicators and agricultural procedures. The inverse relationship between droplet size and drift potential is well known. The paper “Effects of 2,4- D Formulation and Quinclorac on Spray Droplet Size and Deposition” (Weed Technology, 2005: 1030-1036) investigated the effects of herbicide formulation on spray atomization. A figure in the paper suggested the normal distribution with mean 1050 µm and standard deviation 150 µm was a reasonable model for droplet size for water (the “control treatment”) sprayed through a 760 ml/min nozzle. [5+5+5+5 = 20 points] 1 (a) what is the probability that the size of a single droplet is less than 1500 µm? At least 1000 µm? (b) what is the probability that the size of a single droplet is between 1000 and 1500 µm? If the sizes of five independently selected droplets are measured

Answer 1