Your company harvests trees and plants saplings for the future crops.  Current practice is to add a treatment to the soil to support growth.  One of the manufacturers of the treatment chemical has indicated there will be an extremely sharp increase in the price, and you need to determine if it is worth the company’s investment to continue the old protocol.  Your data suggests that the average height of a 5-month-old sapling treated with the chemical is 58.2-cm.  You collect data on n=19 saplings that have not been treated, and the average height after 5-months is x=56.1 (with a standard deviation of s=5.4). Use a hypothesis test to argue whether or not lack of treatment caused the decline in size. Calculate the P-value for this hypothesis test:        P-value:  p

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Your company harvests trees and plants saplings for the future crops.  Current practice is to add a treatment to the soil to support growth.  One of the manufacturers of the treatment chemical has indicated there will be an extremely sharp increase in the price, and you need to determine if it is worth the company’s investment to continue the old protocol.  Your data suggests that the average height of a 5-month-old sapling treated with the chemical is 58.2-cm.  You collect data on n=19 saplings that have not been treated, and the average height after 5-months is x=56.1 (with a standard deviation of s=5.4). Use a hypothesis test to argue whether or not lack of treatment caused the decline in size. Calculate the P-value for this hypothesis test:        P-value:  p
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