Hw8 sol - 16.34 (a) Margin of error decreases. (b) The...

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Homework 8 Solution Chapter 16 16.15 (a) H 0 : The patient is healthy ( or “the patient should no see a doctor”); H a : The patient is ill ( or “the patient should see a doctor”). A Type I error is a false positive – sending a healthy patient to the doctor. A Type II error means a false negative – clearing a patient who should be referred to a doctor. (b) One might wish to lower the probability of a false negative so that most ill patients are treated, especially for serious diseases that require fast treatment. On the other hand, if resources (for example, money or medical personnel) are limited, or for less serious health problems, lowering the probability of false positives might be desirable.
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Unformatted text preview: 16.34 (a) Margin of error decreases. (b) The P-value decreases (the evidence against H becomes stronger). ( c) The power increases (the test becomes better at distinguishing between the null and alternative hypotheses). Chapter 18 Chapter 19 19.6 (a) A t-distribution with reasonably large df is quite similar to a standard Normal distribution. So, as long as the samples were not too small, we know that the value t=8.37 would have a very small P-value. (b) The smaller sample is 61 students, so we use df=60. . 19.12 We have two small samples (each n=4), so t procedures are not reliable unless both distributions are Normal. Chapter 20...
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This note was uploaded on 03/09/2010 for the course MATH 57595 taught by Professor Kushner during the Spring '10 term at University of Texas-Tyler.

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Hw8 sol - 16.34 (a) Margin of error decreases. (b) The...

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