# DDT in rats Poisoning by the pesticide DDT causes convulsions in humans and other

## Problem 42 Chapter 10.2

The Practice of Statistics | 5th Edition

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Problem 42

DDT in rats Poisoning by the pesticide DDT causes convulsions in humans and other mammals. Researchers seek to understand how the convulsions are caused. In a randomized comparative experiment, they compared 6 white rats poisoned with DDT with a control group of 6 unpoisoned rats. Electrical measurements of nerve activity are the main clue to the nature of DDT poisoning. When a nerve is stimulated, its electrical response shows a sharp spike followed by a much smaller second spike. The researchers measured the height of the second spike as a percent of the first spike when a nerve in the rats leg was stimulated.33 For the poisoned rats, the results were 12.207 16.869 25.050 22.429 8.456 20.589 The control group data were 11.074 9.686 12.064 9.351 8.182 6.642 (a) Do these data provide convincing evidence that DDT affects the mean relative height of the second spikes electrical response? (b) Interpret the P-value from part (a) in the context of this study

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Math 1070 – Elementary Statistics Lecture notes prepared by Dr. Leslie Meadows (Coordinator Math 1070 and GSU Commons MILE) based on the texts: Elementary Statistics coordinating PowerPoint Slides.n for Math1070; Georgia State University and Elementary Statistics; Eleventh Edition. Mario F. Triola, and Chapter 2 – Summarizing and Graphing Data 2-2 – Frequency Distributions Definition A...

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