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Example Study 1: A researcher finds 2,000 men over 40 who exercise regularly and have not had heart attacks. She matches each with a similar man who does not exercise regularly, and she follows both groups for five years. Example Study 2: Another researcher finds 4,000 men over 40 who have not had heart attacks and are willing to participate in a study. She assigns 2,000 of them into a regular program of supervised exercise. The other 2,000 continued their usual habits. The researcher follows both groups for five years. Review the example studies above and answer the following questions in your main post: a. After reviewing the examples above, create your own study that will determine if regular exercise reduces the risk of a heart attack. b. Is your study more similar to example study one or example study two? Why? c. Given that example study one is an observational study and example study two is an experiment, is your study an observational study or an experimental study? Explain. d. Why does the second way of studying the question (the experiment), give more useful information about whether exercise reduces the risk of heart attacks? e. What population do you think the researcher wants information about in example study two? What was the sample in this case? Does your study examine the same sample? Explain
what portion of variation in stock price percentage change is explained by the percent change in profit and what is the approximate predicted value for tips if the total bill is $100?
Give the state transition probability matrix
Explain or predict the response variable in every regression study, we use one or more explanatory variables. These variables are also called predictor variables or independent variables.
What test or tests would you use to rule out chance from causing the apparent differences in these data and is there a significant correlation?
The distribution of scores was approximately bell
A group of researchers runs a study in which they look at the relationship between music preferences and reading preferences. What statistical test should the researchers use on their data?
Develop an ordered array and plot a percentage histogram, what conclusions can you reach about the differences in the state cigarette tax between the states?
in 350 words or more, explain how you might view statistics differently and how you will use statistics in your everyday life. Will you apply what you have learned in this course? How?
starbucks coffee co. uses a data-based approach to improving the quality and customer satisfaction of its products.
use only hand calculators on this exam minitab or any other computer software is not allowed. the textbook but no
For the daily lottery game in Illinois, participants select three numbers between 0 and 9. A number cannot be selected more than once, so a winning ticket could be, say, 307 but not 337. Purchasing one ticket allows you to select one set of num..
amount of time spent studying each day for local and overseas students aspire llp is a recruitment agency. recently
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