# Applying Basic Statistical Principles

Imagine that you conducted a study about rheumatoid arthritis, and your report indicates that those patients with the disease had the following antibody levels:

 Antibody Level Frequency Cumulative Frequency 20 3 – 30 5 – 43 3 – 48 7 –

Provide the following five (5) pieces of information, each of which is worth twenty (20) points:

1. Complete the cumulative frequency column in the chart above.
2. Calculate the mode, the median, and the mean. Explain your calculation process.
3. Graph the frequency distribution through the use of graphical tools in Excel, or an open source alternative for plotting graphs such as Dia.
4. Explain whether or not the sample is normally distributed. Explain your response.
5. Use technology and information resources to find an article in a nursing, medical, or science journal that examines the relationship between rheumatoid arthritis and antibodies. Provide an APA reference for the article. All you need to do is list the reference.

The specific course learning outcomes associated with this assignment are:

• Demonstrate techniques for the graphical presentation of results.
• Use the normal distribution and confidence intervals.
• Use technology and information resources to research issues in statistical concepts for healthcare.
• Write clearly and concisely about statistical concepts for healthcare using proper writing mechanics.