Use the following to answer Questions 21 and 22 DDT is a pes

Use the following to answer Questions 21 and 22. DDT is a pesticide banned in the United States for its danger to humans and animals. In an experiment or the impact of DDT, 6 rats were exposed to DDT poisoning and 6 rats were not. For each rat in inc experiment, a measurement of nerve sensitivity was recorded. The researchers suspected that the mean nerve sensitivity for rats exposed to DDT is greater than that for rats not poisoned. The data follow. Poisoned rats: 12.207 16.869 25.050 22.429 8.456 20.589 Unpoisoned rats: 11.074 9.686 12.064 9.351 8.182 6.642 Let mu1, be the mean nerve sensitivity for rats poisoned with DDT. Let mu2, be the mean nerve sensitivity for rats not poisoned with DDT. Which of the following is the alternative hypothesis for the relevant significance testing problem? Ha :mu1 > Mu 2 Ha

Solution

A. There isn\'t much evidence to support a conclusion that the mean nerve sensitivity is greater in rats exposed to DDT than in rats not exposed to DDT.