Technology. In Exercises 9-12, test the given claim by using the display provided from technology. Use a 0.05 significance level. Identify the null and alternative hypotheses, test statistic, P-value (or
9. Airport Data Speeds Data Set 32 “Airport Data Speeds” in Appendix B includes Sprint data speeds (mbps). The accompanying TI-83/84 Plus display results from using those data to test the claim that they are from a population having a
For Exercise 9
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Student Workbook For Elementary Statistics
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Statistical Reasoning for Everyday Life (5th Edition)
Fundamentals of Statistics (5th Edition)
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Statistics: The Art and Science of Learning from Data (4th Edition)
- What is meant by the sample space of an experiment?arrow_forwardThe p- Value in hypothesis testing corresponds to the significance level where a critical value of the test statistic is the same as the calculated value. A. True B. Falsearrow_forwardIn Exercises, use either the critical-value approach or the P-value approach to perform the required hypothesis test. Ballistic Fingerprinting. Guns make unique markings on bullets they fire and their shell casings. These markings are called ballistic ngerprints. An ABCNEWS Poll examined the opinions of Americans on the enactment of a law “. . . that would require every gun sold in the United States to be test-red first, so law enforcement would have its fingerprint in case it were ever used in a crime.” The following problem is based on the results of that poll. Independent simple random samples were taken of 537 women and 495 men. When asked whether they support a ballistic fingerprinting law, 446 of the women and 307 of the men said “yes.” At the 1% significance level, do the data provide sufficient evidence to conclude that women tend to favor ballistic fingerprinting more than men?arrow_forward
- The following table shows the cross-classification of accounting practices (either straight line, declining balance, or both) and country (either France, Germany, or United Kingdom). France Germany United Kingdom Straight Line 20 11 30 Declining Balance 14 16 15 Both 15 23 13 a.Set up the competing hypotheses to determine if accounting practice and country are dependent. b.What is the degrees of freedom for the test. c.Calculate the value of the test statistic ( x2) d.Compute the p-value. e. Does the evidence suggest market capitalization and objective are dependent at the 1% significance level?arrow_forward3.193 Although, in practice, sample data are generally analyzed ininferential studies, what is the ultimate objective of such studies?arrow_forwardPart 1) A researcher is going to conduct a survey about changes in drug offense sentencing. Assume 100 people will be surveyed. If at least 53% of those surveyed support the removal of mandatory sentencing laws, the researcher is going to conclude more than 50% of all residents support the removal. Based on this, what is the significance level of the test? Part 2) A researcher is going to conduct a survey about changes in drug offense sentencing. Assume 100 people will be surveyed. If at least 53% of those surveyed support the removal of mandatory sentencing laws, the researcher is going to conclude more than 50% of all residents support the removal. If the true percent of residents who support the removal is 55%, what is the probability of committing a type II error?arrow_forward
- Problems pertain to the P-value approach to hypothesis testing. Explain why the P-value of a hypothesis test is also referred to as the observed significance level.arrow_forwardThe October 2019 Gallup Poll reported the proportion of Republicans, Independents, and Democrats who favor the legalization of marijuana. Here are the results: Step 1: Test Set-Up Step 2. Select the Level of Significance, α A 5 percent significance level is selected. Step 3. State the Null Hypothesis (H0) and Alternate Hypothesis (H1) H0: H1: Step 4. Compose the Decision Rule Step 5. Calculate the Value of the Test Statistic, p-value, and estimate statistical power (Use G*Power) Use G*Power to calculate statistical power. Use these settings: Test family: z tests Statistical test: Proportion: Difference between two independent proportions Type of power analysis: Post hoc: Compute achieved power – given α, sample size and effect size Step 6. Decide and Reportarrow_forwardIn Exercises 5–20, conduct the hypothesis test and provide the test statistic and the P-value and/or critical value, and state the conclusion. Police Calls The police department in Madison, Connecticut, released the following numbers of calls for the different days of the week during a February that had 28 days: Monday (114); Tuesday (152); Wednesday (160); Thursday (164); Friday (179); Saturday (196); Sunday (130). Use a 0.01 significance level to test the claim that the different days of the week have the same frequencies of police calls. Is there anything notable about the observed frequencies?arrow_forward
- A study investigated survival rates for in-hospital patients who suffered cardiac arrest. Among 60,000 patients who had cardiac arrest during the day, 11,610 survived and were discharged. Among 28,500 patients who suffered cardiac arrest at night, 5400 survived and were discharged. Use a 0.01 significance level to test the claim that survival rates are the same for day and night patients. a) Define the parameters and state null and alternative hypothesis b) Test Statistics c) P-value Approach d) Conclusionarrow_forwardUse the method of hypothesis testing to determine if Ryan should conclude his saplings are growing. Take a 5% significance level.arrow_forwardBack in April and May of 1985, the Gallup organization conducted a poll to estimate the percentage of Americans who approved of how President Reagan was handling his job. At the 5% significance level, do the data suggest that the percentage of those who approved of Reagan increased from April to May in 1985? Population 1: April p = 795/1528 = 0.5203Population 2: May p = 840/1528 = 0.5497Show all your steps, setting up your null and alternative hypothesis.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