Spray drift is a constant concern for pesticide applicators and agricultural pro

Question

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"t investigated the effects of herbicide formulation on spray atomization. A figure in a paper suggested the normal distribution with mean 1050 m and standard deviation 150 m 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 1485 m? At least 1000 m? (Round your answers to four decimal places.) less than 1485 m at least 1000 m (b) what is the probability that the size of a single droplet is between 1000 and 1485 m? (Round your answer to four decimal places.) (c) How would you characterize the smallest 2% of all droplets? (Round your answer to two decimal places.) The smallest 2% of droplets are those smaller than m in size. (d) If the sizes of five independently selected droplets are measured, what is the probability that at least one exceeds 1485 m? (Round your answer to four decimal places.)

Explanation / Answer

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"t investigated the effects of herbicide formulation on spray atomization. A figure in a paper suggested the normal distribution with mean 1050 m and standard deviation 150 m 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 1485 m? At least 1000 m? (Round your answers to four decimal places.) less than 1485 m at least 1000 m (b) what is the probability that the size of a single droplet is between 1000 and 1485 m? (Round your answer to four decimal places.) (c) How would you characterize the smallest 2% of all droplets? (Round your answer to two decimal places.) The smallest 2% of droplets are those smaller than m in size. (d) If the sizes of five independently selected droplets are measured, what is the probability that at least one exceeds 1485 m? (Round your answer to four decimal places.)

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