# Determine whether building these systems helped reduce new cases of malaria.

Assignment 2: Dropbox Assignment

This assignment focuses on nonparametric methods. When a researcher is not in a situation to be able to assume parametric statistical methods requirements, known distribution, or dealing with small sample size, then nonparametric statistical methods need to be used, which make fewer assumptions about the distributional shape.

Nonparametric Methods

In this assignment, we will use the following nonparametric methods:
•The Wilcoxon signed-rank test: The Wilcoxon signed-rank test is the nonparametric test analog of the paired t-test.
•The Wilcoxon rank-sum test or the Mann-Whitney U test: The Wilcoxon rank-sum test is an analog to the two-sample t-test for independent samples.

For each exercise, there will be a sample problem that shows how the calculations are done and the problems for you to work on.

Part 1: Wilcoxon Signed-Rank Test

Let’s take a hypothetical situation. The World Health Organization (WHO) wants to investigate whether building irrigation systems in an African region helped reduce the number of new cases of malaria and increased the public health level.

Data was collected for the following variables from ten different cities of Africa:
•The number of new cases of malaria before the irrigation systems were built
•The number of new cases of malaria after the irrigation systems were built

Table 1: Cases of Malaria

City Before After
1 110 55
2 240 75
3 68 15
4 100 10
5 120 21
6 110 11
7 141 41
8 113 5
9 112 13
10 110 8

Using the Minitab statistical analysis program to enter the data and perform the analysis, complete the following:
•Run a sample Wilcoxon signed-rank test to show whether there is a statistically significant difference between the number of cases before and after the irrigation systems were built.
•Obtain the rank-sum.
•Determine the significance of the difference between the groups.
•Determine whether building these systems helped reduce new cases of malaria.

In aIDition, in a Microsoft Word document, provide a written interpretation of your results in APA format.

Refer to the Assignment Resources: Wilcoxon Signed-Rank Test Example to view an example of the Wilcoxon signed-rank test. The same resource is also available under lecture Nonparametric Methods.

Submission Details:
•Name your Minitab output file SU_PHE5020_W2_A2a_LastName_FirstInitial.mtw.
•Submit your Minitab output file and document separately to the W2 Assignment 2 Dropbox by Saturday, December 12, 2015.

Part 2: Wilcoxon Rank-Sum Test

Let us consider another hypothetical situation. The WHO wants to compare the mortality rates of children under the age of five years of underdeveloped and developed regions of the world. There were two independent samples of ten countries from each of the groups drawn at the same time, and the yearly mortality rates of children under the age of five years (per 100,000) inhabitants were reported (MRate1 and MRate2).

Table 2: Mortality Rates of Children

Country MRate1 MRate2
1 120 11
2 110 9
3 105 13
4 61 11
5 45 14
6 114 11
7 118 10
8 138 8
9 85 6
10 70 6

Using the Minitab statistical analysis program to enter the data and perform the analysis, complete the following:
•Run the Wilcoxon rank-sum test to show whether there is a statistically significant difference between the mortality rates of children under the age of five years of the regions. Results may be used in making decisions regarding which region needs to receive help to improve the public health issues of morality.
•Obtain the difference in the mortality rates and whether there is a statistically significant difference.

In aIDition, in a Microsoft Word document, provide a written interpretation of your results in APA format.

Submission Details:
•Name your Minitab output file SU_PHE5020_W2_A2c_LastName_FirstInitial.mtw.
•Submit your Minitab output file and document separately to the W2 Assignment 2 Dropbox by Saturday, December 12, 2015.

Maximum Points

Initial setup of the assignment—introduction.
10

Explanation of the criteria for selecting the procedure in Minitab.
30

Proper use of the Minitab statistical analysis tool and execution.
15

Provided a copy of the output.
15

Written interpretation of results using correct spelling, grammar, professional vocabulary, and APA format.
30

Total:
100

Shows the help line number for South University Online Inc. The number is 1-888-444-3404.

Presents example of the Wilcoxon signed-rank test.

## Order a similar paper and get 15% discount. Use the coupon code GILB

98% Success Rate
“Hello, I deliver nursing papers on time following instructions from the client. My primary goal is customer satisfaction. Welcome for plagiarism free papers”
Stern Frea
98% Success Rate
Hi! I am an English Language and Literature graduate; I have written many academic essays, including argumentative essays, research papers, and literary analysis.
Dr. Ishid Elsa
98% Success Rate
"Hi, count on me to deliver quality papers that meet your expectations. I write well researched papers in the fields of nursing and medicine".
Dr. Paul P. Klug
99% Success Rate
"A top writer with proven reliability and experience. I have a 99% success rate, overall rating of 10. Hire me for quality custom written nursing papers. Thank you"

### How Our Essay Writing Service Works

Fill out order details and instructions, then upload any files or additional materials if needed. Then, confirm your order by clicking “Place an Order.”

Your payment is processed by a secure system. We accept Mastercard, Visa, Amex, and Discover. We don’t share any informati.on with third parties

## The Writing Process

You can communicate with your writer. Clarify or track order with our customer support team. Upload all the necessary files for the writer to use.

## Recent Questions

### Personal Branding

Personal Branding

### Marketing Research

Marketing Research

### Social Media Marketing

Social Media Marketing

### Public Health Emergencies

Public Health Emergencies