Concept explainers
Interpreting Power Chantix (varenicline) tablets are used as an aid to help people stop smoking. In a clinical trial, 129 subjects were treated with Chantix twice a day for 12 weeks, and 16 subjects experienced abdominal pain (based on data from Pfizer, Inc.). If someone claims that more than 8% of Chantix users experience abdominal pain, that claim is supported with a hypothesis test conducted with a 0.05 significance level. Using 0.18 as an alternative value of p, the power of the test is 0.96. Interpret this value of the power of the test.
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Chapter 8 Solutions
Essentials of Statistics (6th Edition)
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Elementary Statistics Using Excel (6th Edition)
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Fundamentals of Statistics (5th Edition)
Statistics for Business and Economics (13th Edition)
Statistical Reasoning for Everyday Life (5th Edition)
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- In a clinical trial of a drug intended to help people stop smoking, 125 subjects were treated with the drug for 12 weeks, and 14 subjects experienced abdominal pain. If someone claims that more than 8% of the drug's users experience abdominal pain, that claim is supported with a hypothesis test conducted with a 0.05 significance level. Using 0.17 as an alternative value of p, the power of the test is 0.95. Interpret this value of the power of the test. The power of 0.95 shows that there is a % chance of rejecting the hypothesis of p = when the true proportion is actually That is, if the proportion of users who experience abdominal pain is actually then there is a % chance of supporting the claim that the proportion of than 0.08. users who experience abdominal pain is (Type integers or decimals. Do not round.)arrow_forwardReports show that 92% of online searches in March 2021 use Google as the search engine. A network administrator wants to determine whether the percentage of searches that use Google is different in their company. They sample 800 searches and find that 758 of them use Google. Can they conclude that the percentage of searches that use Google in this company differs from 92%? Use the a = 0.05 level of significance.arrow_forwardResearchers were interested in determining whether gender and/or the number of tours soldiers served affected the incidence of PTSD. The PTSD impact instrument was used and scores were recorded upon discharge. State the null and alternative hypotheses. Include both interaction and main effect hypotheses (should be 3 null and 3 alternate hypotheses).arrow_forward
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- According to a recent study, 15% of adults who take a certain medication experience side effects. To further investigate this finding, a researcher selects a separate random sample of 150 adults, of which 32 experience side effects. The researcher would like to determine if there is convincing statistical evidence that the true proportion of adults who would experience side effects from this medication is greater than 0.15 using a significance level of α = 0.05. Complete the "Do” and "Conclude” steps using the z-table. Which statements are true? Check all that apply.arrow_forwardA poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming. The results are given in the accompanying data table. Use a 0.05 significance level to test the claim that the sex of the respondent is independent of the choice for the cause of global warming. Do men and women appear to agree, or is there a substantial difference? Human activity Natural patterns Don't knowMale 313 133 52Female 306 157 49 Identify the null and alternative hypotheses. Compute the test statistic. (round 3 decimal places) Find the critical value(s). (round 3 decimal places) What is the conclusion based on the hypothesis test?arrow_forwardA poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming. The results are given in the accompanying data table. Use a 0.05 significance level to test the claim that the sex of the respondent is independent of the choice for the cause of global warming. Do men and women appear to agree, or is there a substantial difference? Human activity Natural patterns Don't know Male 329 144 45 Female 318 171 43 Compute the test statistic. enter your response here (Round to three decimal places as needed.) Find the critical value(s). enter your response here (Round to three decimal places as needed. Use a comma to separate answers as needed.)arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillCollege Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning