Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Textbook Question
Chapter 9.2, Problem 38E
Exercises 9.35–9.40 contain graphs portraying the decision criterion for a one-mean z-test. The curve in each graph is the normal curve for the test statistic under the assumption that the null hypothesis is true. For each exercise, determine the
a. rejection region.
b. nonrejection region.
c. critical value(s).
d. significance level.
e. Construct a graph similar to that in Fig. 9.3 on page 378 that depicts your results from parts (a)–(d).
f. Identify the hypothesis test as two tailed, left tailed, or right tailed.
9.38
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Chapter 9 Solutions
Introductory Statistics (10th Edition)
Ch. 9.1 - Explain the meaning of the term hypothesis as used...Ch. 9.1 - Regarding the term null hypothesis: a. Originally,...Ch. 9.1 - What role does the decision criterion play in a...Ch. 9.1 - Suppose that you want to perform a hypothesis test...Ch. 9.1 - Suppose that you are considering a hypothesis test...Ch. 9.1 - Suppose that, in a hypothesis test, the null...Ch. 9.1 - Suppose that, in a hypothesis test, the null...Ch. 9.1 - What is the relation between the significance...Ch. 9.1 - Answer true or false and explain your answer: If...Ch. 9.1 - Answer true or false and explain your answer: For...
Ch. 9.1 - Identify the two types of incorrect decisions in a...Ch. 9.1 - Suppose that a hypothesis test is performed at a...Ch. 9.1 - Approving Nuclear Reactors. Suppose that you are...Ch. 9.1 - Guilty or Innocent? In the U.S. court system, a...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - In Exercises 9.159.22, hypothesis tests are...Ch. 9.1 - Toxic Mushrooms? Refer to Exercise 9.15. Explain...Ch. 9.1 - 9,24 Grey-Seal Nursing. Refer to Exercise 9-16....Ch. 9.1 - Iron Deficiency? Refer to Exercise 9.17. Explain...Ch. 9.1 - Early-Onset Dementia. Refer to Exercise 9.18....Ch. 9.1 - Serving Time. Refer to Exercise 9,19. Explain what...Ch. 9.1 - Worker Fatigue. Refer to Exercise 9.20. Explain...Ch. 9.1 - Body Temperature. Refer to Exercise 9.21. Explain...Ch. 9.1 - Teacher Salaries. Refer to Exercise 9.22. Explain...Ch. 9.2 - In each of Exercises 9.31-9.34, define the term...Ch. 9.2 - In each of Exercises 9.319.34, define the term...Ch. 9.2 - In each of Exercises 9.319.34, define the term...Ch. 9.2 - In each of Exercises 9.319.34, define the term...Ch. 9.2 - Exercises 9.359.40 contain graphs portraying the...Ch. 9.2 - Exercises 9.359.40 contain graphs portraying the...Ch. 9.2 - Exercises 9.359.40 contain graphs portraying the...Ch. 9.2 - Exercises 9.359.40 contain graphs portraying the...Ch. 9.2 - Exercises 9.359.40 contain graphs portraying the...Ch. 9.2 - Exercises 9.359.40 contain graphs portraying the...Ch. 9.2 - In each of Exercises 9.419.46, determine the...Ch. 9.2 - In each of Exercises 9.419.46, determine the...Ch. 9.2 - In each of Exercises 9.419.46, determine the...Ch. 9.2 - In each of Exercises 9.419.46, determine the...Ch. 9.2 - In each of Exercises 9.419.46, determine the...Ch. 9.2 - In each of Exercises 9.419.46, determine the...Ch. 9.3 - State two reasons why including the P-value is...Ch. 9.3 - What is the P-value of a hypothesis test? When...Ch. 9.3 - Explain how the P-value is obtained for a one-mean...Ch. 9.3 - True or false: The P-value is the smallest...Ch. 9.3 - The P-value for a hypothesis test is 0.06. For...Ch. 9.3 - The P-value for a hypothesis test is 0.083. For...Ch. 9.3 - Which provides stronger evidence against the null...Ch. 9.3 - Which provides stronger evidence against the null...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - In each of Exercises 9.559.62, we have given the...Ch. 9.3 - Prob. 59ECh. 9.3 - Prob. 60ECh. 9.3 - Prob. 61ECh. 9.3 - Prob. 62ECh. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - In Exercises 9.63-9.68, we have given the value...Ch. 9.3 - In Exercises 9.639.68, we have given the value...Ch. 9.3 - Consider a one-mean z-test. Denote z0 as the...Ch. 9.3 - Prob. 70ECh. 9.3 - Obtaining the P-value. Let x denote the test...Ch. 9.4 - Explain why considering outliers is important when...Ch. 9.4 - Prob. 73ECh. 9.4 - Prob. 74ECh. 9.4 - Prob. 75ECh. 9.4 - Prob. 76ECh. 9.4 - Prob. 77ECh. 9.4 - Prob. 78ECh. 9.4 - Prob. 79ECh. 9.4 - Prob. 80ECh. 9.4 - Prob. 81ECh. 9.4 - Prob. 82ECh. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Preliminary data analyses indicate that applying...Ch. 9.4 - Job Gains and Losses. In the article Business...Ch. 9.4 - Hotels and Motels. The daily charges, in dollars,...Ch. 9.4 - Body Temperature. A study by researchers at the...Ch. 9.4 - Teacher Salaries. Data on salaries in the public...Ch. 9.4 - Cell Phones. The number of cell phone users has...Ch. 9.4 - Prob. 95ECh. 9.4 - Left-Tailed Hypothesis Tests and CIs. In Exercise...Ch. 9.4 - Prob. 97ECh. 9.5 - What is the difference in assumptions between the...Ch. 9.5 - Suppose that you want to perform a hypothesis test...Ch. 9.5 - Fill in the following blanks. a. The t-test is...Ch. 9.5 - Exercises 9.1019.106 pertain to P-values for a...Ch. 9.5 - Exercises 9.1019.106 pertain to P-values for a...Ch. 9.5 - Exercises 9.1019.106 pertain to P-values for a...Ch. 9.5 - Exercises 9.1019.106 pertain to P-values for a...Ch. 9.5 - Exercises 9.1019.106 pertain to P-values for a...Ch. 9.5 - Exercises 9.1019.106 pertain to P-values for a...Ch. 9.5 - In each of Exercises 9.1079.112, we have provided...Ch. 9.5 - In each of Exercises 9.1079.112, we have provided...Ch. 9.5 - In each of Exercises 9.1079.112, we have provided...Ch. 9.5 - In each of Exercises 9.1079.112, we have provided...Ch. 9.5 - Prob. 111ECh. 9.5 - Prob. 112ECh. 9.5 - Preliminary data analyses indicate that you can...Ch. 9.5 - Preliminary data analyses indicate that you can...Ch. 9.5 - Preliminary data analyses indicate that you can...Ch. 9.5 - Preliminary data analyses indicate that you can...Ch. 9.5 - Preliminary data analyses indicate that you can...Ch. 9.5 - Prob. 118ECh. 9.5 - In each of Exercises 9.119-9.122, use the...Ch. 9.5 - In each of Exercises 9.119-9.122, use the...Ch. 9.5 - Prob. 121ECh. 9.5 - Prob. 122ECh. 9.5 - Stressed-Out Bus Drivers. Previous studies have...Ch. 9.5 - Prob. 124ECh. 9.5 - Prob. 125ECh. 9.5 - Two-Tailed Hypothesis Tests and CIs. The following...Ch. 9.5 - Left-Tailed Hypothesis Tests and CIs. In Exercise...Ch. 9.5 - Prob. 128ECh. 9.6 - Technically, what is a nonparametric method? In...Ch. 9.6 - Prob. 130ECh. 9.6 - Prob. 131ECh. 9.6 - Prob. 132ECh. 9.6 - Prob. 133ECh. 9.6 - Prob. 134ECh. 9.6 - Prob. 135ECh. 9.6 - Prob. 136ECh. 9.6 - Prob. 137ECh. 9.6 - Prob. 138ECh. 9.6 - Prob. 139ECh. 9.6 - Prob. 140ECh. 9.6 - Prob. 141ECh. 9.6 - Prob. 142ECh. 9.6 - Prob. 143ECh. 9.6 - Prob. 144ECh. 9.6 - Prob. 145ECh. 9.6 - Prob. 146ECh. 9.6 - Prob. 147ECh. 9.6 - Prob. 148ECh. 9.6 - Prob. 149ECh. 9.6 - Prob. 150ECh. 9.6 - Prob. 151ECh. 9.6 - Prob. 152ECh. 9.6 - Prob. 153ECh. 9.6 - In each of Exercises 9.149-9.154, use the Wilcoxon...Ch. 9.6 - Prob. 155ECh. 9.6 - Prob. 156ECh. 9.6 - Prob. 157ECh. 9.6 - Prob. 158ECh. 9.6 - Prob. 159ECh. 9.6 - Prob. 160ECh. 9.6 - Delaying Adulthood. The convict surgeonfish is a...Ch. 9.6 - Prob. 162ECh. 9.6 - Prob. 163ECh. 9.6 - Prob. 164ECh. 9.6 - Prob. 165ECh. 9.6 - Prob. 166ECh. 9.6 - Prob. 167ECh. 9.6 - Prob. 168ECh. 9.6 - Assuming that the null hypothesis H0: = 0 is...Ch. 9.6 - Prob. 170ECh. 9.6 - Prob. 171ECh. 9.6 - Prob. 172ECh. 9.6 - Prob. 173ECh. 9.6 - Prob. 174ECh. 9.6 - Prob. 175ECh. 9.6 - In Exercises 9.173-9.178, a. apply the sign test...Ch. 9.6 - Prob. 177ECh. 9.6 - Prob. 178ECh. 9.7 - Why don't hypothesis tests always yield correct...Ch. 9.7 - Define each term. a. Type I error b. Type II error...Ch. 9.7 - Explain the meaning of each of the following in...Ch. 9.7 - What does the power of a hypothesis test tell you?...Ch. 9.7 - Why is it useful to obtain the power curve for a...Ch. 9.7 - What happens to the power of a hypothesis test if...Ch. 9.7 - Prob. 185ECh. 9.7 - Prob. 186ECh. 9.7 - Prob. 187ECh. 9.7 - Prob. 188ECh. 9.7 - Prob. 189ECh. 9.7 - Prob. 190ECh. 9.7 - Prob. 191ECh. 9.7 - In Exercises 9.1919.196, we have given a...Ch. 9.7 - In Exercises 9.1919.196, we have given a...Ch. 9.7 - Prob. 194ECh. 9.7 - Prob. 195ECh. 9.7 - Prob. 196ECh. 9.7 - Prob. 197ECh. 9.7 - Grey-Seal Nursing. Repeat parts (a)(c) of Exercise...Ch. 9.7 - Prob. 199ECh. 9.7 - Early-Onset Dementia. Repeat parts (a)(c) of...Ch. 9 - Explain the meaning of each term. a. null...Ch. 9 - The following statement appeared on a box of Tide...Ch. 9 - Regarding a hypothesis test: a. 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What...Ch. 9 - Cheese Consumption. The U.S. Department of...Ch. 9 - Cheese Consumption. The null and alternative...Ch. 9 - Prob. 28RPCh. 9 - Prob. 29RPCh. 9 - Prob. 30RPCh. 9 - Prob. 31RPCh. 9 - Betting the Spreads. College basketball, and...Ch. 9 - Prob. 33RPCh. 9 - Prob. 34RPCh. 9 - Problems 34 and 35 each include a normal...Ch. 9 - Prob. 36RPCh. 9 - Prob. 37RPCh. 9 - Prob. 38RPCh. 9 - Prob. 39RPCh. 9 - Body Mass Index. Body mass index (BMI) is a...Ch. 9 - Prob. 41RPCh. 9 - Prob. 1FDACh. 9 - At the beginning of this chapter, we discussed...
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