A randomized block experimental design is most like a: Higher-order experiment Steepest ascent/decline experiment Taguchi robustnes
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A randomized block experimental design is most like a:
Higher-order experiment
Steepest ascent/decline experiment
Taguchi robustness design
A Latin or Graeco-Latin design
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- RECIDIVISM Report a Chi-Square test of Independence and use a 5% significance level. Explain the potential error in words, in context. Group of answer choices We would be accepting that there was an association between Recidivism and Treatment, when there was none. We would not be accepting that there was an association between Recidivism and Treatment, when there was indeed none. We would be not accepting that there was an association between Recidivism and Treatment, when there actually was one. We would be accepting that there was an association between Recidivism and Treatment, when there was indeed one.What design? Analyze the design of each researchexample reported. Is it a sample survey, an observational study, or an experiment? If a sample, what are the popula-tion, the parameter of interest, and the sampling procedure? If an observational study, was it retrospective or prospective? If an experiment, describe the factors, treatments, randomi-zation, response variable, and any blocking, matching, or blinding that may be present. In each, what kind of conclu-sions can be reached?The journal Circulation reported that among 1900 peoplewho had heart attacks, those who drank an average of19 cups of tea a week were 44% more likely thannondrinkers to survive at least 3 years after the attack.What design? Analyze the design of each researchexample reported. Is it a sample survey, an observational study, or an experiment? If a sample, what are the popula-tion, the parameter of interest, and the sampling procedure? If an observational study, was it retrospective or prospective? If an experiment, describe the factors, treatments, randomi-zation, response variable, and any blocking, matching, or blinding that may be present. In each, what kind of conclu-sions can be reached?Older Americans with a college education are significantlymore likely to be emotionally well-off than are peoplein this age group with less education. Among those aged65 and older, 35% scored 90 or above on the EmotionalHealth Index, but for those with a college degree, thepercentage rose to 43% (post-graduate degree, 46%). Theresults are based on phone interviews conducted betweenJanuary 2010 and July 2011. (Source: gallup.com,August 19, 2011)
- Anova Stats test Billy Bob Joe is a statistics instructor who participates in triathlons. Listed in the table below are times (in mins & seconds) he recorded while riding a bike for five laps through each mile of a 3 mile loop. Use a 0.05 significance level to test if the time it takes to ride each mile is different. Does one of the miles appear to have a hill? Mile 1 3:15 3:24 3:23 3:22 3:21 Mile 2 3:19 3:22 3:21 3:17 3:19 Mile 3 3:34 3:31 3:29 3:31 3:29What design? Analyze the design of each researchexample reported. Is it a sample survey, an observational study, or an experiment? If a sample, what are the popula-tion, the parameter of interest, and the sampling procedure? If an observational study, was it retrospective or prospective? If an experiment, describe the factors, treatments, randomi-zation, response variable, and any blocking, matching, or blinding that may be present. In each, what kind of conclu-sions can be reached?A soft-drink manufacturer must be sure the bottle capson the soda are fully sealed and will not come off easily.Inspectors pull a few bottles off the production line atregular intervals and test the caps. If they detect anyproblems, they will stop the bottling process to adjust orrepair the machine that caps the bottles.What design? Analyze the design of each researchexample reported. Is it a sample survey, an observational study, or an experiment? If a sample, what are the popula-tion, the parameter of interest, and the sampling procedure? If an observational study, was it retrospective or prospective? If an experiment, describe the factors, treatments, randomi-zation, response variable, and any blocking, matching, or blinding that may be present. In each, what kind of conclu-sions can be reached? People who read the last page of a mystery novel firstgenerally like stories better. Researchers recruited 819college students to read short stories, and for one story,they were given a spoiler paragraph beforehand. On thesecond and third story, the spoiler was incorporated as the opening paragraph or not given at all. Overall, par-ticipants liked the stories best after first reading spoilers. (Source: Psychological Science, August 12, 2011)
- In which of these research designs would you have complete control of the environment? Cohort Cross-sectional Experimental Case-ControlResearchers investigate how the presence of cell phones influence the quality of human interaction. Subjects are randomly selected from a population and divided into an experimental group that is asked to leave their phones in the front of the room and a control group that are not asked to leave their cell phones at the front of the room. Subjects are left alone for 10 minutes and then asked to take a survey designed to measure quality of interactions they had with others in the experiment. What statistical test is appropriate?When neither the subject nor those having contact with the subject know the treatment assignment, the study is called unbiased. double-blind. blind. statistically significant. randomized.
- What design? Analyze the design of each researchexample reported. Is it a sample survey, an observational study, or an experiment? If a sample, what are the popula-tion, the parameter of interest, and the sampling procedure? If an observational study, was it retrospective or prospective? If an experiment, describe the factors, treatments, randomi-zation, response variable, and any blocking, matching, or blinding that may be present. In each, what kind of conclu-sions can be reached?An orange-juice processing plant will accept a shipmentof fruit only after several hundred oranges selected fromvarious locations within the truck are carefully inspected.If too many show signs of unsuitability for juice (bruised,rotten, unripe, etc.), the whole truckload is rejected.What design? Analyze the design of each researchexample reported. Is it a sample survey, an observational study, or an experiment? If a sample, what are the popula-tion, the parameter of interest, and the sampling procedure? If an observational study, was it retrospective or prospective? If an experiment, describe the factors, treatments, randomi-zation, response variable, and any blocking, matching, or blinding that may be present. In each, what kind of conclu-sions can be reached? 1. Researchers identified 242 children in the Cleveland areawho had been born prematurely (at about 29 weeks).They examined these children at age 8 and again at age20, comparing them to another group of 233 childrennot born prematurely. Their report, published in the New England Journal of Medicine, said the “preemies” en-gaged in significantly less risky behavior than the others.Differences showed up in the use of alcohol and mari-juana, conviction of crimes, and teenage pregnancy.A recent study investigated if the distribution of gender is the same across all academic ranks. Data were collected by taking a random sample of individuals from within each academic rank and then recording each individuals gender. Use the output below to conduct the appropriate hypothesis test. Use a 0.05 level of significance. Null and alternative hypotheses Test Statistic value p-value decision based on the p-value