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- M13 Assignment, Q5 - F-Distribution and One-Way ANOVAA bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states. At a = 0.05, is there enough evidence to conclude that there is a difference in the interest rates paid by the two states? State A State B Sample size Mean interest rate (%) 40 40 3.5 3.9 Population variance 0.02 0.03What 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)work shown would be so appreciated!A partially completed ANOVA table for a completely randomized design is shown here: SS SOURCE DF MS F Treatments 18.4 A Error C D E Total 41 45.2 Complete the ANOVA table. What is the value of D? (one decimal only)
- Q5 (Control Chart Question)- Xbar chart for a process has been constructed. Is the process statistically under Control? (Yes/No), Why? . 20 15 UCL = 13 CL = 10 10 LCL = 7 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Sample number Answer:CHOOSE ALL THAT APPLY: Which of the following are assumptions of ANOVA? Random sample Independent variable(s) are normally distributed Dependent variable is continuous Dependent variable is discrete Treatment variances are similar Treatment means are similar Dependent variables are normally distributedSecond slide is the first part of the question and first slide is the second part of the question.
- 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.Degrees of Sum of Source Freedom Squares Square (Variance) Among c-1=? SSA=? MSA = 69 Consider an experiment with three groups, with nine values in each. For the ANOVA summary table shown to the right, fill in all Within the missing results. groups groups Total n-c=? SSW = 552 n-1=? SST = ? Complete the ANOVA summary table below. Degrees of Sum of Source Freedom Squares Among groups c-1= SSA= Within groups n-ca Total n-1= (Simplify your answers.) SSW = 552 SST Mean Square (Variance) MSA = 69 MSW= Mean MSW = ? F FSTAT F FSTAT = ? ***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.