Mathematics

Mathematics, 30.07.2019 01:20, Tibbit94

Part d
establishing causality is often a main focus of statistical studies. what is the best type of study to conduct
to establish causality? use the situation in this task to support your answer.

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Mathematics, 13.07.2019 09:00, cherry12345627

**60 pts** the sales director noticed that sales in the midwest and northeast regions were not as expected. additional field training is necessary for the sales representatives in these regions. after conducting a one-month training program, the sales director wants to determine the effectiveness of the training. after all, the company invested a significant amount of money in this program! so the sales director collects the sales data for the first month after the training. the sales director wants to compare the number of orders secured by those who attended the training program and those who didn’t attend. this study will the company to determine the effectiveness of the training. part a what type of study is the sales director conducting—a survey, an observational study, or an experiment? justify your answer. part b describe how you would design the selection of subjects for this study. assume there are 1,000 total sales representatives in the midwest and northeast regions, with 500 in each region. about half of the representatives in each region were assigned the training, and half were not. be sure to also describe any processes you would include in your study to contribute to the best design possible. part c suppose the company decided to allow the sales representatives to choose whether to participate in the field-training program or to opt out. there are 400 who have chosen to participate in the field-training program and 600 who have opted out of the program. how might the self-selection process affect the statistical validity of the comparison of the change in the proportion of sales orders from new stores? support your answer with a specific example. part d establishing causality is often a main focus of statistical studies. what is the best type of study to conduct to establish causality? use the situation in this task to support your answer.

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Social Studies, 30.07.2019 05:10, dayanirisr45

In 1,250-1,500 words, answer the following questions about possible research options. create a research question in the field of psychology that you are interested in researching. write questions clearly. include a brief background of the problem you are proposing and why it is important to the field of psychology. state the null and alternative hypothesis (in both words and statistical notation) need to address the research question. choose which statistical test would be used to conduct the study and support it with research. describe the type of data needs to be collected to conduct the study and what techniques are best for collecting data.

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Mathematics, 21.08.2019 21:30, hayleydawn

Part destablishing causality is often a main focus of statistical studies. what is the best type of study to conductto establish causality? use the situation in this task to support your answer.

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Health, 09.10.2019 17:30, nayelimoormann

Two studies test a hypothesis about the association between crime and drug use. study a uses a cross-sectional survey design to test the hypothesis that crime increases drug use. adults are surveyed and asked about their levels of drug use and criminal behavior. study b uses a cross-sectional survey design to test the hypothesis that juvenile delinquency causes drug use. adults are surveyed about their delinquent behaviors in adolescence and whether they are currently using drugs. with respect to the two studies: a.study a does a better job of meeting criteria for establishing causality between variablesb.neither a nor b does a better job of meeting the criteria for establishing a causal connectionc.study a is preferable to study bin terms of the criterion of association onlyd.study b does a better job of meeting criteria for establishing causality between variablese.study b is preferable in terms of the criterion of nonspuriousness only

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Part d
establishing causality is often a main focus of statistical studies. what is the best t...

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