Mathematics

Write a statistical report based on the sample of 50 freight trains in United States. The project consists of two files (1) The sample data are provided in the Excel file under “data” sheet. (2) The results should be reported and analyzed/explained in an Microsoft Word file (report) Your report should have an introduction part that provides brief background information on the freight trains. Then start present your sample results to cover all topics listed below. You should present all results in a logical and organized way. A list of numbers and charts will not earn high scores. (1) A stem-and-leaf plot (with proper keys) to present all sample data (2) A bar graph to summarize the sample data by display a frequency distribution (with proper classes and details) (3) Centers of the sample data – mean and median: discuss in general what they measure and what example results show. (4) Measure the variation of the sample data – standard deviation and range: discuss in general what they measure and what example results show. (5) Discuss if there are any outliers in the sample in a quantitative way (e.g. IQR measure). (6) Explain the meaning of confidence interval for a pouplation mean and present the 90%-confidence interval from this sample. In the end, use a paragraph to close the report.

The importance of digital library in covid 19 pandemic

Explain the difference between interior and exterior angles of a polygon. Identify two theorems related to angles of a polygon and give an example of an application of each.

The purpose of this paper is to write a summary about Identifiable Intangible Assets and Subsequent Accounting for Goodwill from the FASB meeting in 15 july 2020https://www.fasb.org/jsp/FASB/FASBContent_C/ProjectUpdateExpandPage&cid=1176171566054&pf=trueWhat is the purpose of this meeting?What are the updates?And why they want to update the goodwill codification?I have attached PowerPoint slides that could help in finding some information about it.

Write a 6–8 page paper in which you: Create an argument supporting that the requirements of SOX have reduced corporate fraudulent activity due to the requirements placed on public accounting firms, thereby providing greater assurances to public users of financial information. Provide support for your argument. Evaluate the issues related to the audit of Satyam Computer Services Limited, indicating whether PWC followed auditing standards in rendering its audit opinion of the company. Provide support for the rationale. Assess whether PWC relied too heavily on the established system of internal controls and neglected to perform sufficient testing of transactions using effective computer-aided audit tools. Provide a rationale for the recommendation.  Analyze whether PWC neglected to sufficiently test transactions or whether it could have relied on the audit of internal control to limited testing in those areas, indicating any consequences related to their decision. Provide support for the conclusion. Support a position for whether PWC met its responsibility of “due care” based on the requirements placed on auditors by PCAOB. Suggest improvements needed to external auditing firms and the accounting profession to reduce the number of audit scandals and fraudulent activity within publicly traded companies. Provide support for suggestions.  Use at least three quality resources in this assignment. Note: Wikipedia and similar websites do not qualify as quality resources.  This course requires the use of Strayer Writing Standards. For assistance and information, please refer to the Strayer Writing Standards link in the left-hand menu of your course. Check with your professor for any additional instructions. The specific course learning outcome associated with this assignment is: Formulate an argument in support of the Sarbanes-Oxley Act (SOX) by assessing the audit of a given company.

The objective of Week 3 Lab is to evaluate an application of linear programming such as a transportation problem using Solver in ExcelDeliverablesSubmit a Word document with your answers to Steps 2–5.CategoryStep 2:Complete Problem 5-56 from Chapter 5 in the textbook.Formulate and solve (Using Solver) Problem 5-56. This should include setting up an accurate model.Step 3:Create a table showing shipments.Create a table showing the shipments that minimize cost. Note the total cost.Step 4:Explain results to CEO.Explain what the results show as if you are talking to your company president. Explanation should include reporting results from the data and also analyzing the results with good discussion of what the results mean for the manager or CEO.Step 5:Describe what you learned.Lastly, describe what you learned in this assignment and how long it took you to complete it (minus the text reading part).

Given a dataset of 40 items attached (Data_assignment1.csv bellow), where the left column is the independent variable (x) and the right column is the dependent variable (y). Question 1 (5 mark)Use the gradient descent method to fit a linear regression function (i.e., f(x)=?0+?1×1) to the data, where the learning rate is set to 0.01, and the number of iterations is 10,000. Here you need to report the estimated function (i.e., ?0 and ?1 ) and its corresponding mean squared error on the dataset.Question 2 (5 marks)Use the gradient descent method to fit a 3-order polynomial regression function (i.e., f(x)=?0+?1x+?2×2+?3×3) to the data. You are free to choose learning rate and the number of iterations as long as it achieves a reasonable fit. Here you need to report the estimated function and its corresponding mean squared error, along with the learning rate and the number of iterations you used.Question 3 (15 marks)Let us say that you want to select a model based on the dataset for prediction of new data in future. Answer the two questions below.3.1 (10 marks) Which model (from linear to 5-order polynomial) is the fittest for the dataset? Here you need to give steps of your model selection procedure.3.2 (5 marks) What is your predicted regression function. Here you need to explain briefly how you estimate the function after the model is determined, and to report the estimated function and its corresponding mean squared error, along with the learning rate and the number of iterations you used.You may refer to the following Python code on dividing a dataset into folds for the k-folder cross validation.——————————————————————————–np.random.shuffle(data)  # Shuffle all rowsfolds = np.array_split(data, k)  # split the data into k foldsfor i in range(k): x_cv = folds[i][:, 0]  # Set ith fold for testing y_cv = folds[i][:, 1] new_folds = np.row_stack(np.delete(folds, i, 0)) # Remove ith fold for training x_train = new_folds[:, 0]  # Set the remaining folds for trainingy_train = new_folds[:, 1]

Explain the abbreviations in the Equations and give examples on the following Financial Accounting Equations:Find the equations in the attachments.Explain what does each abbreviation mean, where can we get it from and how we solve the equation.

Discuss how it Metrics “2” works (word count 175) Three metrics that are – or should be – used to determine how well the staffing process meets the needs of the organization ( Google) APA

Data Presentation: Using the 2 articles attached (one with grouped frequency distribution chart and the other with a frequency polygon):  Summarize each study’s abstract Take a screenshot or picture of the study’s chart  Explain how this particular chart, graph, or visual is relevant to the study’s efficacy You will complete the above-mentioned points twice, once each for each article Explain ow both methods/charts relate and differentiate.