Essentials of Statistics, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780321926739
Author: Mario F. Triola
Publisher: PEARSON
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Textbook Question
Chapter 1.4, Problem 31BB
In Exercises 31-34, identify which of these designs is most appropriate for the given experiment: completely randomized design, randomized block design, or matched pairs design.
31. Lisinipril Lisinipril is a drug designed to lower blood pressure. In a clinical trial of Lisinipril, blood pressure levels of subjects are measured before and after they have been treated with the drug.
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Morgan City Fire Chief Sidney Pyro is concerned about the low efficiency scores that his firefighters receive at the state testing institute. Chief Pyro believes that these scores result because some firefighters are not in good physical condition. Pyro orders 75 randomly selected firefighters to participate in an hour of exercise per day. Another 200 firefighters have no required exercise. After 60 days, all firefighters are tested again by the state. Chief Pyro collects the data and performs a two-sample independent t-test by using SPSS to examine if there is a statistically significant difference between the treatment and control groups; the SPSS results are shown in the table below.
Groups
N
Mean
Std. Deviation
Std. Error Mean
Test Scores
Treatment
75
74.5
31.4
3.6
Control
200
70.6
26.3
1.9
Formulate a null and research hypothesis:
H0:
H1:
Collect all the necessary data:
Mean score of the treatment group:
Mean score of the control group:
Sample size of the…
Chapter 1 Solutions
Essentials of Statistics, Books a la Carte Edition (5th Edition)
Ch. 1.2 - Statistical Significance versus Practical...Ch. 1.2 - Source of Data In conducting a statistical study,...Ch. 1.2 - Voluntary Response Sample What is a voluntary...Ch. 1.2 - Correlation and Causation What is meant by the...Ch. 1.2 - Consider the Source. In Exercises 5-8, determine...Ch. 1.2 - Consider the Source. In Exercises 5-8, determine...Ch. 1.2 - Consider the Source. In Exercises 5-8, determine...Ch. 1.2 - Consider the Source. In Exercises 5-8, determine...Ch. 1.2 - Sampling Method. In Exercises 9-12, determine...Ch. 1.2 - Sampling Method. In Exercises 9-12, determine...
Ch. 1.2 - Sampling Method. In Exercises 9-12, determine...Ch. 1.2 - Sampling Method. In Exercises 9-12, determine...Ch. 1.2 - Statistical Significance and Practical...Ch. 1.2 - Statistical Significance and Practical...Ch. 1.2 - Statistical Significance and Practical...Ch. 1.2 - Statistical Significance and Practical...Ch. 1.2 - In Exercises 17-20, refer to the data in the table...Ch. 1.2 - In Exercises 17-20, refer to the data in the table...Ch. 1.2 - Prob. 19BSCCh. 1.2 - Conclusion If we use the listed pulse rates with...Ch. 1.2 - In Exercises 21-24, refer to the data in the table...Ch. 1.2 - Prob. 22BSCCh. 1.2 - Prob. 23BSCCh. 1.2 - In Exercises 21-24, refer to the data in the table...Ch. 1.2 - Prob. 25BSCCh. 1.2 - Whats Wrong? In Exercises 25-28, identify what is...Ch. 1.2 - Whats Wrong? In Exercises 25-28, identify what is...Ch. 1.2 - Prob. 28BSCCh. 1.2 - Percentages. In Exercises 29-36, answer the given...Ch. 1.2 - Percentages. In Exercises 29-36, answer the given...Ch. 1.2 - Percentages. In Exercises 29-36, answer the given...Ch. 1.2 - Prob. 32BSCCh. 1.2 - Percentages in Advertising An ad for Big Skinny...Ch. 1.2 - Percentages. In Exercises 29-36, answer the given...Ch. 1.2 - Percentages. In Exercises 29-36, answer the given...Ch. 1.2 - Percentages in Advertising A New York Times...Ch. 1.2 - ATV Accidents The Associated Press provided an...Ch. 1.2 - Falsifying Data A researcher at the...Ch. 1.2 - Whats Wrong with This Picture? The Newport...Ch. 1.3 - Parameter and Statistic What is a parameter, and...Ch. 1.3 - Prob. 2BSCCh. 1.3 - Discrete/Continuous Data Which of the following...Ch. 1.3 - Identifying the Population In a Gallup poll of...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 5-12, determine whether the given...Ch. 1.3 - In Exercises 13-20, determine whether the given...Ch. 1.3 - In Exercises 13-20, determine whether the given...Ch. 1.3 - In Exercises 13-20, determine whether the given...Ch. 1.3 - In Exercises 13-20, determine whether the given...Ch. 1.3 - Prob. 17BSCCh. 1.3 - In Exercises 13-20, determine whether the given...Ch. 1.3 - Prob. 19BSCCh. 1.3 - In Exercises 13-20, determine whether the given...Ch. 1.3 - In Exercises 21-28, determine which of the four...Ch. 1.3 - In Exercises 21-28, determine which of the four...Ch. 1.3 - Prob. 23BSCCh. 1.3 - In Exercises 21-28, determine which of the four...Ch. 1.3 - In Exercises 21-28, determine which of the four...Ch. 1.3 - In Exercises 21-28, determine which of the four...Ch. 1.3 - In Exercises 21-28, determine which of the four...Ch. 1.3 - In Exercises 21-28, determine which of the four...Ch. 1.3 - In Exercises 29-32, identify the level of...Ch. 1.3 - In Exercises 29-32, identify the level of...Ch. 1.3 - In Exercises 29-32, identify the level of...Ch. 1.3 - In Exercises 29-32, identify the level of...Ch. 1.3 - Countable For each of the following, categorize...Ch. 1.3 - Scale for Rating Food A group of students develops...Ch. 1.3 - Interpreting Temperature Increase In the Born...Ch. 1.4 - Simple Random Sample At a national conference of...Ch. 1.4 - Observational Study and Experiment You want to...Ch. 1.4 - Simple Random Convenience Sample A student of the...Ch. 1.4 - Convenience Sample The author conducted a survey...Ch. 1.4 - In Exercises 5-8, determine whether the given...Ch. 1.4 - In Exercises 5-8, determine whether the given...Ch. 1.4 - In Exercises 5-8, determine whether the given...Ch. 1.4 - In Exercises 5-8, determine whether the given...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - In Exercises 9-20, identify which of these types...Ch. 1.4 - Simple Random Samples. In Exercises 21-26,...Ch. 1.4 - Simple Random Samples. In Exercises 21-26,...Ch. 1.4 - Prob. 23BSCCh. 1.4 - Simple Random Samples. In Exercises 21-26,...Ch. 1.4 - Simple Random Samples. In Exercises 21-26,...Ch. 1.4 - Simple Random Samples. In Exercises 21-26,...Ch. 1.4 - Prob. 27BBCh. 1.4 - In Exercises 27-30, indicate whether the...Ch. 1.4 - In Exercises 27-30, indicate whether the...Ch. 1.4 - In Exercises 27-30, indicate whether the...Ch. 1.4 - In Exercises 31-34, identify which of these...Ch. 1.4 - In Exercises 31-34, identify which of these...Ch. 1.4 - Prob. 33BBCh. 1.4 - In Exercises 33-36, identify which of these...Ch. 1.4 - Blinding For the study described in Exercise 34,...Ch. 1.4 - Sample Design Literacy In Cardiovascular Effects...Ch. 1 - Chicago Bulls The numbers of the current players...Ch. 1 - Chicago Bulls Which of the following best...Ch. 1 - Earthquake Depths Data Set 16 includes depths (km)...Ch. 1 - Earthquake Depths Are the earthquake depths...Ch. 1 - Earthquake Depths Which of the following best...Ch. 1 - Earthquake Depths True or false: If you construct...Ch. 1 - Prob. 7CQQCh. 1 - Parameter and Statistic In a recent Gallup poll,...Ch. 1 - Observational Study or Experiment Are the data...Ch. 1 - 10. Statistical Significance and Practical...Ch. 1 - Walmart Stores Currently, there are 4227 Walmart...Ch. 1 - Whats Wrong? A survey sponsored by the American...Ch. 1 - Whats Wrong? A survey included 4230 responses from...Ch. 1 - Sampling Seventy-two percent of Americans squeeze...Ch. 1 - Percentages a. The labels on U-Turn protein energy...Ch. 1 - Why the Discrepancy? A Gallup poll was taken two...Ch. 1 - Statistical Significance and Practical...Ch. 1 - Marijuana Survey In a recent Pew poll of 1500...Ch. 1 - Marijuana Survey Identify the type of sampling...Ch. 1 - Marijuana Survey Exercise 8 referred to a Pew poll...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - Prob. 5CRECh. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - For Chapter 2 through Chapter 14, the Cumulative...Ch. 1 - Simple Random Sample In this project, we will use...Ch. 1 - Critical Thinking The concept of six degrees of...Ch. 1 - Critical Thinking The concept of six degrees of...
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- List the sample space of each experiment. Rolling one die and tossing one coinarrow_forwardList the sample space of each experiment. Picking a one-digit numberarrow_forwardMorgan City Fire Chief Sidney Pyro is concerned about the low efficiency scores that his firefighters receive at the state testing institute. Chief Pyro believes that these scores result because some firefighters are not in good physical condition. Pyro orders 75 randomly selected firefighters to participate in an hour of exercise per day. Another 200 firefighters have no required exercise. After 60 days, all firefighters are tested again by the state. Chief Pyro collects the data and performs a two-sample independent t-test by using SPSS to examine if there is a statistically significant difference between the treatment and control groups; the SPSS results are shown in the table below. Group Statistics Groups N Mean Std. Deviation Std. Error Mean Test Scores Treatment 75 74.5 31.4 3.6 Control 200 70.6 26.3 1.9 a. Formulate a null and research hypothesis: H0: H1: Collect all the necessary data: Mean score of the treatment group:…arrow_forward
- A school superintendent wants to know the effects of a four week anti-bullying course on high school students. The superintendent randomly selects 200 high school students and randomly assigns 100 high school students to participate in the course. She then assigns the remaining 100 high school students to not participate in the course. At the end of the course, the superintendent will observe the students' behavior in a school setting.Which of the following methods was used in this study? A. experimental study B. randomized experiment C. observational study D. surveyarrow_forwardIn Exercises 33–36, identify which of these designs is most appropriate for the given experiment: completely randomized design, randomized block design, or matched pairs design. Lipitor A clinical trial of Lipitor treatments is being planned to determine whether its effects on diastolic blood pressure are different for men and women.arrow_forward(OPHTHALMOLOGY) The following data are from a study on Botox injections. Patients received a high-dose injection in one eye (experimental treatment = treatment E) and a low-dose injection in the other eye (control treatment = treatment C). Patients were asked to rate the level of pain in each eye on a 1–10 scale, with higher scores indicating more pain. The assignment of treatments to eyes was randomized. The subjects came back over several visits. Data from the last visit are given in the following table: 1. Which of the following is the correct test to conduct given the situation above? 2. The hypotheses are: 3. What is the level of significance? 4. What is the computed test statistic? Hint: Use (mean of "Pain in E eye") minus (mean of "Pain in C eye") 5. What is the correct decision based on the p-value or critical value method?arrow_forward
- 5. Use the data set 1. This is the result of a randomized trial in Uganda where 10 students in the same village were selected and given a solar-powered reading lamp. The second group was not given any lamp. The number of students out of 10 who improved their school grades for both groups were recorded. The experiment was repeated in 50 villages. Test the hypothesis that solar-powered reading lamps are effective in improving school grades in Uganda.arrow_forwardThe effect of three different grades of gasoline on fuel economy in car engines is being studied. Fuel economy is measured using brake-specific fuel consumption after the engine has been running for 15 minutes. Five different car engines are available for the study, and the experimenters conduct the following randomized complete block design. Car Gasoline grade 1 2 3 4 1 0.545 0.685 0.530 0.445 0.550 2 0.510 0.644 0.497 0.339 0.522 3 0.523 0.605 0.498 0.410 0.520 (a) Analyze the data from this experiment. (b)Use the Bonferroni correction method to make comparisons among the three grades of gasoline to determine specifically which grades differ in brake-specific fuel consumption.arrow_forwardQuestion: Describe how you would implement a completely randomized design of the Jennifer/John experiment, with 127 science faculty members?arrow_forward
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