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QuestionResearchers examining the effectiveness of a short course that teaches diabetic self-care. Fifty diabetic patients were enrolled in the course, and fifty others served as a control group. (Patients were randomly assigned between the two groups.) Six months after the course, blood sugar level ... Read More
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QuestionIn a table it is shown the research result of dependence between calories and fat for some popular fast-food items: Calories (x) 270 420 210 450 130 310 290&nbs ... Read More
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QuestionIn a survey of 500 nurses, 100 doctors and 30 administrators, the current parking policy was opposed by 360 nurses, 60 doctors and 5 administrators. a) Summarise the data in a contingency table (two-way table). b) What percent oppose the parking policy? c) ... Read More
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QuestionResearchers are working with a cohort of 1,313 people. They waited couple years to see which ones would expose themselves to some possibly harmful thing and 851 of them did. The other 462 did not have (report) the exposure. Then they waited a few more years and observed which people go ... Read More
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QuestionA survey asked professionals “Which of the following is your most common choice for breakfast?” Using the following data from a random survey, determine whether doctors choose breakfasts in different proportions from other professionals, to a 0.05 significance level. & ... Read More
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Question This question requires you to analyze the dataset “world-ec.csv". The unit of observation is the nation-state. The variables are per capita Gross Domestic Product (purchasing power parity terms, 2010) and the last recorded Gini Coeffcient for the country. (The Gini Coeffcient is a m ... Read More
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QuestionThis question requires you to analyze the dataset “presvote.csv”. It contains data on presidential election vote shares for the party of the incumbent president from 1948 to 2004. The variables are defined in the spreadsheet.(a) What is the average and standard deviation of the i ... Read More
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QuestionThis question requires you to download and analyze the dataset “abortion-laws.csv”. Consult the associated abortion-codebook.csv" for variable definitions.(a) Estimate a regression model with the total number of abortion restrictions as the dependent variable, and church attenda ... Read More
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QuestionA researcher in the insurance industry is interested in the time (in months) it takes an insurance firm to adopt an innovation in the way in which business is conducted in the industry. He believes the elapsed time involved can be explained by the size of the firm (total assets in mill ... Read More
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QuestionChoose a particular company. For example, (TWC).Time Warner Cable. Estimate the revenue, receivable, inventory, or payables using regression method .Find their financial data at https://finance.yahoo.com/ calculate a projection for the next twelve months. And present your data an ... Read More
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Question Monsterz Toyz has developed a new action figure for boys that comes in six different colors. The manufacturer claims that the ratio of colors in each batch (in order from least to most popular) is 10% green, 10% red, 15% white, 20% yellow, 20% black and 25% blue. The last batch from the fa ... Read More
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QuestionA researcher ran a study to determine the relationship between how good a person thinks their memory is and how well they actually do on a memory task. They were asked to score their memory (where 1 = very poor and 10 = excellent). Their actual memory was tested by showing them a video of a ... Read More
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