Posts under category Statistics - Your Online Class Tutors

Posts under category Statistics

Graded Discussion: Solve Normal Distribution Application

For this graded discussion, you will be given a scenario to analyze using a cumulative from the mean z-table.
Requirements:

A minimum of two posts is required.
You must give a detailed solution for each part in your first post to get full credit.
It is not enough to just give the final answer. You must show steps or explain your reasoning.
If it is easier, you can write your solution out on paper, take a picture, and upload it to the discussion as a PDF file. The PDF file type is the only file type that will be accepted.
You will be able to see other students' posts once you post your own solution.
Review their responses to determine if they agree with your own.
For your second post, reply to a classmate to indicate if your answers are the same or different from theirs.
If they are different, explain which post you think is correct, yours or theirs.
If your original post was incorrect, reply to yourself with a correction. Don't worry! You will not lose points for an incorrect answer, as long as you make a reasonable effort at the first post and post a reply with the correct answer.
Complete required posts by the posted deadline.

Part 1: Prepare
Familiarize yourself with the following data.
In 1955, scientists R.R. Sokal and P.E. Hunter analyzed the affects of pesticides on houseflies. Among the data sets they collected were samples of housefly wing lengths. These are normally distributed. The data they collected is summarized in the following frequency distribution.

Normally Distributed
frequency and normally distributed data.JPG

*Source: Sokal, R.R. and F.J. Rohlf, 1968. Biometry, Freeman Publishing Co., p 109. Original data from Sokal, R.R. and P.E. Hunter. 1955. A morphometric analysis of DDT-resistant and non-resistant housefly strains Ann. Entomol. Soc. Amer. 48: 499-507.
Part 2: First Post*

Answer these questions:

Find the mean and standard deviation of the sample of housefly wing lengths. (2 points)
List the data values that are within 2 standard deviations of the mean. Justify your answer. (2 points)
What percentage of the data values are within 2 standard deviations of the mean? (2 points)
Is this consistent with the Empirical Rule? Explain. (2 points)

Part 3: Second Post
For your second post, reply to a classmate to indicate if your answers are the same or different from theirs. If they are different, explain which post you think is correct, yours or theirs. (2 points)
If your original post was incorrect, reply to yourself with a correction. Don't worry! You will not lose points for an incorrect answer as long as you make a reasonable effort at the first post and post a reply with the correct answer.

Note that My Course Tutor can help you write this discussion posts under our statistics assignment help services. We have writing experts who are qualified to handle mathematics and statistics courses at all academic learning levels.

Probability Question Example
The following question is a probability question for tossing a fair coin presented in Pearson My STATLAB statistics. Note that probability concepts are the building blocks for any introductory statistics course. To solve the problem, one would have to write down the possible outcomes, and associate each outcome with some probabilities.
Two fair coins are tossed​ (say a dime and a​ quarter). The two possible outcomes for a single coin are​ heads, h, and​ tails, t. Give each of the following.
​(a) the sample space
​(b) the probability of heads on the dime
​(c) the probability of heads on the quarter
​(d) the probability of getting both heads
​(e) the probability of getting the same outcome on both coins

Deliverable 7 - Statistical Analysis Report item options Assignment Content

Competencies

Describe the data using the measures of central tendency and measures of variability.
Apply the normal distribution, standard normal distribution, and central limit theorem.
Develop a confidence interval for a population parameter.
Evaluate hypothesis tests for population parameters from one population.
Evaluate hypothesis tests for population parameters from two populations.
Determine the linear correlation and regression equation between two variables to make predictions for the dependent variable.

Student Success Criteria
View the grading rubric for this deliverable by selecting the “This item is graded with a rubric” link, which is located in the Details & Information pane.

Instructions
You are currently working at NCLEX Memorial Hospital in the Infectious Diseases Unit. Over the past few days, you have noticed an increase in patients admitted with a particular infectious disease. You believe that the ages of these patients play a critical role in the method used to treat the patients. You decide to speak to your manager, and together you work to use statistical analysis to look more closely at the ages of these patients.

You do some research and put together a spreadsheet of the data that contains the following information
Client number
Infection disease status
Age of the patient

Deliverable 7 - Statistical Analysis Report.xlsx

You are to put together a PowerPoint presentation that explains the analysis of your findings which you will submit to your manager. The presentation should contain all components of your findings. For review, the components of the report should include:

Brief overview of the scenario and variables in the data set
Discussion, calculation, and interpretation of the mean, median, mode, range, standard deviation, and variance
Discussion, construction, and interpretation of the 95% confidence interval
Explanation of the full hypothesis test
Conclusion

The calculations should be performed in your spreadsheet that you will also submit to your manager. You can find additional information on what to add to your PowerPoint presentation in this Word document.

Deliverable 7 - PowerPoint Instructions.docx

Use the questions in the Word document as your guide for the contents of your presentation.

For your final deliverable, submit your PowerPoint presentation and the Excel workbook showing your work. Do not submit your Word document.

Deliverable 6 - Analysis with Correlation and Regression item options
Assignment Content

Competency
Determine the linear correlation and regression equation between two variables to make predictions for the dependent variable.

Student Success Criteria
View the grading rubric for this deliverable by selecting the “This item is graded with a rubric” link, which is located in the Details & Information pane.

Scenario
According to the U.S. Geological Survey (USGS), the probability of a magnitude 6.7 or greater earthquake in the Greater Bay Area is 63%, about 2 out of 3, in the next 30 years. In April 2008, scientists and engineers released a new earthquake forecast for the State of California called the Uniform California Earthquake Rupture Forecast (UCERF).

As a junior analyst at the USGS, you are tasked to determine whether there is sufficient evidence to support the claim of a linear correlation between the magnitudes and depths from the earthquakes. Your deliverables will be a PowerPoint presentation you will create summarizing your findings and an excel document to show your work.

Concepts Being Studied
Correlation and regression
Creating scatterplots
Constructing and interpreting a Hypothesis Test for Correlation using r as the test statistic

You are given a spreadsheet that contains the following information:

Magnitude measured on the Richter scale
Depth in km

Deliverable 6 - Analysis with Correlation and Regression.xlsx

Using the spreadsheet, you will answer the problems below in a PowerPoint presentation.

What to Submit
The PowerPoint Assignment presentation should answer and explain the following questions based on the spreadsheet provided above.

Slide 1: Title slide

Slide 2: Introduce your scenario and data set including the variables provided.

Slide 3: Construct a scatterplot of the two variables provided in the spreadsheet. Include a description of what you see in the scatterplot.

Slide 4: Find the value of the linear correlation coefficient r and the critical value of r using α = 0.05. Include an explanation on how you found those values.

Slide 5: Determine whether there is sufficient evidence to support the claim of a linear correlation between the magnitudes and the depths from the earthquakes. Explain.

Slide 6: Find the regression equation. Let the predictor (x) variable be the magnitude. Identify the slope and the y-intercept within your regression equation.

Slide 7: Is the equation a good model? Explain. What would be the best predicted depth of an earthquake with a magnitude of 2.0? Include the correct units.

Slide 8: Conclude by recapping your ideas by summarizing the information presented in context of the scenario.

Along with your PowerPoint presentation, you should include your Excel document which shows all calculations.
This assignment falls under the inferential section of your online statistics class. My Course Tutor experts are competent at handling such assignments. The firs step in handling a statistics assignment is to understand the nature of the data, and to review the possible category of data analysis methods within which hypothesis testing falls. The excel file for this assignment has been attached.

Deliverable 6 - Analysis with Correlation and Regression.xlsx

Deliverable 5 - Hypothesis Tests for Two Samples item options
Assignment Content

Competency
Evaluate hypothesis tests for population parameters from two populations.

Dealing with Two Populations
Inferential statistics involves forming conclusions about a population parameter. We do so by constructing confidence intervals and testing claims about a population mean and other statistics. Typically, these methods deal with a sample from one population. We can extend the methods to situations involving two populations (and there are many such applications). This deliverable looks at two scenarios.

Concept being Studied
Your focus is on hypothesis tests and confidence intervals for two populations using two samples, some of which are independent and some of which are dependent. These concepts are an extension of hypothesis testing and confidence intervals which use statistics from one sample to make conclusions about population parameters.

Student Success Criteria
View the grading rubric for this deliverable by selecting the “This item is graded with a rubric” link, which is located in the Details & Information pane.

What to Submit
Your research and analysis should be presented on the spreadsheet provided.

Deliverable 5 - Hypothesis Tests for Two Samples.xlsx

In order to successfully complete this problem, one would need to use the seven hypothesis testing steps included in our other statistics-related assignment. The relevant files associated with this assignment have been attached to this post. A guide for completing this assignment have been prepared by our statistics assignment experts.

Hypothesis test for two samples example.docx