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PUBH 8520 WU Wk 6 Confounding & Effect Modification Epidemiological Methods Worksheet
Using the document (attached) ,answer the questions about the possible role of confounders and effect modifiers and quanti ...
PUBH 8520 WU Wk 6 Confounding & Effect Modification Epidemiological Methods Worksheet
Using the document (attached) ,answer the questions about the possible role of confounders and effect modifiers and quantitatively assess the impact of confounders and effect modifiers on the results of a study. Please show all the work. Thank you!
Introduction to Statistics Question Response
In a survey, 24 IT professionals in Chicago were asked how much their annual salary was for the year 2012. The results are ...
Introduction to Statistics Question Response
In a survey, 24 IT professionals in Chicago were asked how much their annual salary was for the year 2012. The results are shown below:
$109,000
$ 65,000
$ 65,000
$ 59,000
$ 180,000
$ 101,325
$ 130,000
$95,000
$ 81,500
$69,000
$71,500
$ 74,880
$64,000
$72,000
$ 71,000
$ 82,300
$49,000
$51,200
$ 39,000
$48,500
$64,330
$ 41,100
$52,330
$82,000
Construct a frequency distribution with 5 classes.
Create a histogram of the data using the frequency table from question 1-a.
A software company asked 100 of its programmers to develop a certain program individually. The following histogram shows the time it takes a programmer to finish the task:
How many classes are there for the given histogram?
What is the class width of the histogram?
What percentage of programmers can complete the task in 30 hours?
How many hours does it take the majority of the programmers to complete the task?
Search the Internet for prices of 11 different laptops.
Compute the mean, median, and mode of these prices.
Find the first and third quartiles of the prices.
In the following image, the memory usage of various processes of a computer running a Windows Operating System is shown:
Create a scatter plot of the memory usage of the processes.
Find the following measures of central tendency of the memory usage in kilobytes (Kb):
Mean
Mode
Median
Find the following measures of dispersion of the memory usage in Kb:
Range
Variance
Standard Deviation
Identify the values that are responsible for the variance of the dataset. Provide a possible solution on how the computer user could decrease the variance of his or her memory usage.
Answer the following questions completely, using proper grammar, complete sentences, and correct terminology:
Explain what it means to have a standard deviation of 0.
Without doing any calculations, is it possible to tell which of the following 2 sets has a higher standard deviation? Explain your answer.
Set 1 = {1,2,3,4,5,6,7,8}
Set 2 = {2,4,6,8,10,12,14,16}
GC MOD 8 Treating Depression Lithium and The Placebo Group Project
Prompt
We will analyze the data to answer the second research question: Which of the drugs (if either) delayed the recurre ...
GC MOD 8 Treating Depression Lithium and The Placebo Group Project
Prompt
We will analyze the data to answer the second research question: Which of the drugs (if either) delayed the recurrence of depression longer relative to the placebo?
In the previous lab-preparation activity, we identified Treat as the explanatory variable and Time as the response variable. We also determined that we will analyze the data using side-by-side boxplots and descriptive statistics (i.e. 5-number summaries since the graphs are boxplots).
Make graphs and tables.
Use StatCrunch to produce side-by-side boxplots. (directions)
Embed your graphs with your initial post.
Use StatCrunch to produce the descriptive statistics (a table containing the 5-number summaries for each comparison group). (directions)
Copy and paste the StatCrunch output table into your initial post.
Analyze the data: Compare the distributions for the treatment groups as demonstrated in Unit 2. For example, compare medians and intervals of typical values. Describe the shape and any outliers. Be sure to write your comparisons so the reader can understand the context of the numbers. For example, don't just say the median is 30; instead, say something like this: on average patients taking the placebo relapsed in 30 days (Q2=30 days).
Draw a conclusion: What can we conclude from your analysis? Did one drug successfully delay a relapse of depression better than the others? What evidence supports your conclusion?
Summarize your conclusions in response to both research questions: In this lab you compared three treatments (two drugs and the placebo) using two different variables. In Part 1 you compared whether or not a relapse into depression occurred for each of the two drugs and the placebo. In Part 2 you compared the length of time until the next relapse for the two drugs and the placebo. What can you conclude in light of both analyses? Is one treatment better than the other? How does the data support your conclusion?
This is the side by side that I have made in question
Summary statistics for AcuteT:
Group by: Treat
Treat n Mean Variance Std. dev. Std. err. Median Range Min Max Q1 Q3 0 37 172.62162 6446.7973 80.29195 13.199915 173 393 48 441 114 211 1 38 183.65789 6782.1771 82.353974 13.359579 166.5 381 47 428 131 212 2 34 202.11765 10590.168 102.90854 17.648669 163.5 442 70 512 140 246
PSY 1110 Ohio University Module 7 Statistics Concepts of Probability Quiz
Requesting Statistics Module 7 Quiz to be answered completely...notes are attached.
PSY 1110 Ohio University Module 7 Statistics Concepts of Probability Quiz
Requesting Statistics Module 7 Quiz to be answered completely...notes are attached.
MTH 311 Pima Medical Institute Tucson Statistics Article Summary
Search the Scientific American website to find a recent article (within the last 10 years) about a statistical study on a ...
MTH 311 Pima Medical Institute Tucson Statistics Article Summary
Search the Scientific American website to find a recent article (within the last 10 years) about a statistical study on a topic that you find interesting related to business, government, or health care. Searching on the word “statistics” will give you a good list of articles to consider.(Note: The study CANNOT reference the Nurses’ Health Study!)This assignment requires Level 1 Writing Guidelines.Provide the full website address of the article. (2 points)In your own words, summarize the article, and identify whether the study was observational or an experiment. (3 points.)State the goal or purpose of the study, i.e. what did the researchers want to find out? (2 points)Identify the population, sample, and variables of interest.(3 points)State what conclusions were drawn from the sample (4 points)Identify any flaws or potential flaws in this study (3 points) Points Possible: 20Content: 17 ptsWriting Guidelines: 3 ptsReference:http://www.scientificamerican.com/search/
Week 6 Discussion: Confidence Intervals
Confidence Intervals
In everyday terms, a confidence interval is the range of values around a sample statistic (such as me ...
Week 6 Discussion: Confidence Intervals
Confidence Intervals
In everyday terms, a confidence interval is the range of values around a sample statistic (such as mean or proportion) within which clinicians can expect to get the same results if they repeat the study protocol or intervention, including measuring the same outcomes the same ways. As you ask yourself, "Will I get the same results if I use this research?", you must address the precision of study findings, which is determined by the Confidence Interval. If the CI around the sample statistic is narrow, you can be confident you will get close to the same results if you implement the same research in your practice.
Consider the following example. Suppose that you did a systematic review of studies on the effect of tai chi exercise on sleep quality, and you found that tai chi affected sleep quality in older people. If, according to your study, you found the lower boundary of the CI to be .49, the study statistic to be 0.87, and the upper boundary to be 1.25, this would mean that each end limit is 0.38 from the sample statistic, which is a relatively narrow CI.
(UB + LB)/2 = Statistic [(1.25 + .49)/2 = .87]
Keep in mind that a mean difference of 0 indicates there is no difference; this CI does not contain 0. Therefore, the sample statistic is statistically significant and unlikely to occur by chance.
Because this was a systematic review, and tai chi exercise has been established from the studies you assessed as helping people sleep, based on the sample statistics and the CI, clinicians could now use your study and confidently include tai chi exercises among possible recommendations for patients who have difficulty sleeping.
Now you can apply your knowledge of CIs to create your own studies and make wise decisions about whether to base your patient care on a particular research finding.
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Most Popular Content
PUBH 8520 WU Wk 6 Confounding & Effect Modification Epidemiological Methods Worksheet
Using the document (attached) ,answer the questions about the possible role of confounders and effect modifiers and quanti ...
PUBH 8520 WU Wk 6 Confounding & Effect Modification Epidemiological Methods Worksheet
Using the document (attached) ,answer the questions about the possible role of confounders and effect modifiers and quantitatively assess the impact of confounders and effect modifiers on the results of a study. Please show all the work. Thank you!
Introduction to Statistics Question Response
In a survey, 24 IT professionals in Chicago were asked how much their annual salary was for the year 2012. The results are ...
Introduction to Statistics Question Response
In a survey, 24 IT professionals in Chicago were asked how much their annual salary was for the year 2012. The results are shown below:
$109,000
$ 65,000
$ 65,000
$ 59,000
$ 180,000
$ 101,325
$ 130,000
$95,000
$ 81,500
$69,000
$71,500
$ 74,880
$64,000
$72,000
$ 71,000
$ 82,300
$49,000
$51,200
$ 39,000
$48,500
$64,330
$ 41,100
$52,330
$82,000
Construct a frequency distribution with 5 classes.
Create a histogram of the data using the frequency table from question 1-a.
A software company asked 100 of its programmers to develop a certain program individually. The following histogram shows the time it takes a programmer to finish the task:
How many classes are there for the given histogram?
What is the class width of the histogram?
What percentage of programmers can complete the task in 30 hours?
How many hours does it take the majority of the programmers to complete the task?
Search the Internet for prices of 11 different laptops.
Compute the mean, median, and mode of these prices.
Find the first and third quartiles of the prices.
In the following image, the memory usage of various processes of a computer running a Windows Operating System is shown:
Create a scatter plot of the memory usage of the processes.
Find the following measures of central tendency of the memory usage in kilobytes (Kb):
Mean
Mode
Median
Find the following measures of dispersion of the memory usage in Kb:
Range
Variance
Standard Deviation
Identify the values that are responsible for the variance of the dataset. Provide a possible solution on how the computer user could decrease the variance of his or her memory usage.
Answer the following questions completely, using proper grammar, complete sentences, and correct terminology:
Explain what it means to have a standard deviation of 0.
Without doing any calculations, is it possible to tell which of the following 2 sets has a higher standard deviation? Explain your answer.
Set 1 = {1,2,3,4,5,6,7,8}
Set 2 = {2,4,6,8,10,12,14,16}
GC MOD 8 Treating Depression Lithium and The Placebo Group Project
Prompt
We will analyze the data to answer the second research question: Which of the drugs (if either) delayed the recurre ...
GC MOD 8 Treating Depression Lithium and The Placebo Group Project
Prompt
We will analyze the data to answer the second research question: Which of the drugs (if either) delayed the recurrence of depression longer relative to the placebo?
In the previous lab-preparation activity, we identified Treat as the explanatory variable and Time as the response variable. We also determined that we will analyze the data using side-by-side boxplots and descriptive statistics (i.e. 5-number summaries since the graphs are boxplots).
Make graphs and tables.
Use StatCrunch to produce side-by-side boxplots. (directions)
Embed your graphs with your initial post.
Use StatCrunch to produce the descriptive statistics (a table containing the 5-number summaries for each comparison group). (directions)
Copy and paste the StatCrunch output table into your initial post.
Analyze the data: Compare the distributions for the treatment groups as demonstrated in Unit 2. For example, compare medians and intervals of typical values. Describe the shape and any outliers. Be sure to write your comparisons so the reader can understand the context of the numbers. For example, don't just say the median is 30; instead, say something like this: on average patients taking the placebo relapsed in 30 days (Q2=30 days).
Draw a conclusion: What can we conclude from your analysis? Did one drug successfully delay a relapse of depression better than the others? What evidence supports your conclusion?
Summarize your conclusions in response to both research questions: In this lab you compared three treatments (two drugs and the placebo) using two different variables. In Part 1 you compared whether or not a relapse into depression occurred for each of the two drugs and the placebo. In Part 2 you compared the length of time until the next relapse for the two drugs and the placebo. What can you conclude in light of both analyses? Is one treatment better than the other? How does the data support your conclusion?
This is the side by side that I have made in question
Summary statistics for AcuteT:
Group by: Treat
Treat n Mean Variance Std. dev. Std. err. Median Range Min Max Q1 Q3 0 37 172.62162 6446.7973 80.29195 13.199915 173 393 48 441 114 211 1 38 183.65789 6782.1771 82.353974 13.359579 166.5 381 47 428 131 212 2 34 202.11765 10590.168 102.90854 17.648669 163.5 442 70 512 140 246
PSY 1110 Ohio University Module 7 Statistics Concepts of Probability Quiz
Requesting Statistics Module 7 Quiz to be answered completely...notes are attached.
PSY 1110 Ohio University Module 7 Statistics Concepts of Probability Quiz
Requesting Statistics Module 7 Quiz to be answered completely...notes are attached.
MTH 311 Pima Medical Institute Tucson Statistics Article Summary
Search the Scientific American website to find a recent article (within the last 10 years) about a statistical study on a ...
MTH 311 Pima Medical Institute Tucson Statistics Article Summary
Search the Scientific American website to find a recent article (within the last 10 years) about a statistical study on a topic that you find interesting related to business, government, or health care. Searching on the word “statistics” will give you a good list of articles to consider.(Note: The study CANNOT reference the Nurses’ Health Study!)This assignment requires Level 1 Writing Guidelines.Provide the full website address of the article. (2 points)In your own words, summarize the article, and identify whether the study was observational or an experiment. (3 points.)State the goal or purpose of the study, i.e. what did the researchers want to find out? (2 points)Identify the population, sample, and variables of interest.(3 points)State what conclusions were drawn from the sample (4 points)Identify any flaws or potential flaws in this study (3 points) Points Possible: 20Content: 17 ptsWriting Guidelines: 3 ptsReference:http://www.scientificamerican.com/search/
Week 6 Discussion: Confidence Intervals
Confidence Intervals
In everyday terms, a confidence interval is the range of values around a sample statistic (such as me ...
Week 6 Discussion: Confidence Intervals
Confidence Intervals
In everyday terms, a confidence interval is the range of values around a sample statistic (such as mean or proportion) within which clinicians can expect to get the same results if they repeat the study protocol or intervention, including measuring the same outcomes the same ways. As you ask yourself, "Will I get the same results if I use this research?", you must address the precision of study findings, which is determined by the Confidence Interval. If the CI around the sample statistic is narrow, you can be confident you will get close to the same results if you implement the same research in your practice.
Consider the following example. Suppose that you did a systematic review of studies on the effect of tai chi exercise on sleep quality, and you found that tai chi affected sleep quality in older people. If, according to your study, you found the lower boundary of the CI to be .49, the study statistic to be 0.87, and the upper boundary to be 1.25, this would mean that each end limit is 0.38 from the sample statistic, which is a relatively narrow CI.
(UB + LB)/2 = Statistic [(1.25 + .49)/2 = .87]
Keep in mind that a mean difference of 0 indicates there is no difference; this CI does not contain 0. Therefore, the sample statistic is statistically significant and unlikely to occur by chance.
Because this was a systematic review, and tai chi exercise has been established from the studies you assessed as helping people sleep, based on the sample statistics and the CI, clinicians could now use your study and confidently include tai chi exercises among possible recommendations for patients who have difficulty sleeping.
Now you can apply your knowledge of CIs to create your own studies and make wise decisions about whether to base your patient care on a particular research finding.
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