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# . A researcher wants to know whether or not the median pH of rain near Houston, Texas

ISBN: 9780321757272 73

## Solution for problem 4 Chapter 15

Statistics: Informed Decisions Using Data | 4th Edition

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Statistics: Informed Decisions Using Data | 4th Edition

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Problem 4

. A researcher wants to know whether or not the median pH of rain near Houston, Texas, is significantly greater than the median pH of rain near Chicago, Illinois. He randomly selects 12 rain dates in Texas and obtains the following data: Houston, Texas 4.69 5.10 5.22 4.46 4.93 4.65 5.22 4.76 4.25 5.14 4.11 4.71 Source: National Atmospheric Deposition Program Independently, he randomly selects 14 rain dates in Illinois and obtains the following data: Chicago, Illinois 4.40 4.69 4.22 4.64 4.54 4.35 4.69 4.40 4.75 4.63 4.45 4.49 4.36 4.52 Source: National Atmospheric Deposition Program

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Unit 4 Notes: Ethics of Experiments with Humans and Animals Week 3: 24 Jan 2018 Key Terms Key Terms 1. Voluntary response: a type of sampling that is not random and just uses a general call-out to get volunteers to participate 2. Informed consent: should be used in EVERY type of sample. The researcher can choose the sample, but the people chosen...

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