36. Spray drift is a constant concern for pesticide applicators and agricultural producers. The inverse relationship between
Question:
36. Spray drift is a constant concern for pesticide applicators and agricultural producers. 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 mm and standard deviation 150 mm was a reasonable model for droplet size for water (the “control treatment”) sprayed through a 760 ml/min nozzle.
a. What is the probability that the size of a single droplet is less than 1500 mm? At least 1000 mm?
b. What is the probability that the size of a single droplet is between 1000 and 1500 mm?
c. How would you characterize the smallest 2% of all droplets?
d. If the sizes of five independently selected droplets are measured, what is the probability that at least one exceeds 1500 mm?
Step by Step Answer:
Probability And Statistics For Engineering And The Sciences
ISBN: 9781111802325
7th Edition
Authors: Dave Ellis, Jay L Devore