Solution Library


Meta Analysis of Survival Benefit of Radiotherapy

Question We will be conducting a meta-analysis to investigate whether surgery (cystectomy) combined with radiotherapy has a survival benefit (measured at 3-years) compared to radiotherapy alone for patients with bladder cancer. Conduct a keyword search in (ovid) Medline (untick “Map Term t ... Read More

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Meta Analysis of Chocolate Consumption and Cardiometabolic Disorders

Question Explain a “component cause” using the Rothman framework. In your answer you need to mention how sufficient and necessary causes relate to a component cause. Is this statement true or false? Lack of consistence does not necessarily constitute evidence against a causal associa ... Read More

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Lowering Defect Rate in Computer Chip Manufacturing Company

Question A company manufacturing computer chips finds that 8% of all chips manufactured are defective.  Management is concerned that high employee turnover is partially responsible for the high defect rate.  In an effort to decrease the percentage of defective chips, management decides to ... Read More

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Estimation of True Proportion with 98 Percent Confidence

Question A company manufacturing computer chips finds that 8% of all chips manufactured are defective.  Management is concerned that high employee turnover is partially responsible for the high defect rate.  In an effort to decrease the percentage of defective chips, management decides to ... Read More

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ABI Insurance Tracking Average Life Expectancy

Question Insurance companies track life expectancy information to assist in determining the cost of life insurance policies.  Last year the average life expectancy of all policy holders that were paid out was 77 years.  ABI Insurance wants to determine of their clients now have a longer l ... Read More

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Estimation of True Mean with 98 Percent Confidence

Question Insurance companies track life expectancy information to assist in determining the cost of life insurance policies.  Last year the average life expectancy of all policy holders that were paid out was 77 years.  ABI Insurance wants to determine of their clients now have a longer l ... Read More

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Statistics that a Professor Teaches are not Performing at the Same Level or Not

Question A professor is concerned that the two sections of statistics that she teaches are not performing at the same level. To test her claim, she looks at the mean exam score for a random sample of students from each of her classes. In class 1, the mean exam score for 12 students is 78.7 with a s ... Read More

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Testing Claim of SAT prep Course Claims to Increase Student Scores

Question An SAT prep course claims to increase student scores by more than 60 points, on average. To test this claim, 9 students who have previously taken the SAT are randomly chosen to take the prep course. Their SAT scores before and after completing the prep course are listed in the following ta ... Read More

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Sufficient Evidence to Say that Batting Average has Improved

Question Adrian hopes that his new training methods have improved his batting average. Before starting his new regimen, he was batting 0.220 in a random sample of 50 at bats.  For a random sample of 24 at bats since changing his training techniques, his batting average is 0.375.  Determin ... Read More

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Project Report on Life Expectancy at Birth in World in 2012

Question Prepare a project report on Life expectancy at birth, total (years) in world in 2012 Objectives Identify a hypothesis testing problem in Conduct a survey to verify or dispute the results of the hypothesis Summarize the article, analysis, and conclusions in a report   Summary ... Read More

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Regression Analysis of Digital Cell Phone Inc

Question Digital Cell Phone, Inc. Paul Jordan has just been hired as a management analyst at Digital Cell Phone, Inc. Digital Cell manufactures a broad line of phones for the consumer market. Paul’s boss, John Smithers, chief operations officer, has asked Paul to stop by his office this morn ... Read More

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Research on Gender Confusion among Urban Adolescents

Question Write a research paper on the topic "Gender confusion is more prevalent among urban adolescents." Summary This question belongs to statistics and discusses gender confusion among urban adolescents. Word count: 2480   ... Read More

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