This paper concentrates on the primary theme of Normal Curves, Variability, and Plotting in which you have to explain and evaluate its intricate aspects in detail. In addition to this, this paper has been reviewed and purchased by most of the students hence; it has been rated 4.8 points on the scale of 5 points. Besides, the price of this paper starts from £ 40. For more details and full access to the paper, please refer to the site.

# Normal Curves, Variability, and Plotting

INSTRUCTIONS:

Michelson, S. & Schofield, T. (2002). Chapter 1: Description. Measures of Central Tendency (pages 9-17). In: The Biostatistics Cookbook: The Most User-Friendly Guide for the Bio/Medical Scientist. Kluwer Academic Publishers. Available in Ebrary, accessed via Trident’s online library.

Norman, G., and Streiner, D. (2008). Chapter The Second: Looking at the Data: A first look at Graphing (pages 7-18). In: Biostatistics The Bare Essentials. 3rd Edition. BC Decker Inc. PMPH USA, Ltd. Shelton, CT. eISBN: 9781607950585 pISBN: 9781550093476. Available in Ebrary, accessed via Trident’s online library.

Norman, G., and Streiner, D. (2008). Chapter The Fourth: The Normal Distribution (pages 31-36). In: Biostatistics The Bare Essentials. 3rd Edition. BC Decker Inc. PMPH USA, Ltd. Shelton, CT. eISBN: 9781607950585 pISBN: 9781550093476. Available in Ebrary, accessed via Trident’s online library.

Additional Reading (Optional)

Minnesota Department of Health. Histogram. Retrieved from http://www.health.state.mn.us/divs/opi/qi/toolbox/histogram.html

PQ Systems (yr. unknown). Histogram: What is it? 106-111. Retrieved from http://www.pqsystems.com/healthcare/images/health.pdf

Villenueve, P. (2002). Normal Distributions: Encyclopedia of Public Health. Retrieved from http://www.enotes.com/normal-distributions-reference/normal-distributions

Additional Resources (Optional):

The Johns Hopkins University and John McGready (2009). Describing Data: Part I, Section D. Visually Displaying Continuous Data: Histograms. Retrieved from http://ocw.jhsph.edu/courses/introbiostats/PDFs/IntroBiostats-sec1d_McGready.pdf

The Johns Hopkins University and John McGready (2009). Describing Data: Part II. Section A: The Normal Distribution. Retrieved from http://ocw.jhsph.edu/courses/IntroBiostats/PDFs/IntroBiostats-sec2a_McGready.pdf

Khan Academy (2012). Histograms. Retrieved from http://www.khanacademy.org/math/algebra/ck12-algebra-1/v/histograms

This is a three-part assignment related to a study of contraceptive drug use among women. Following is a distribution of systolic blood pressures cross tabulated by age and pill use for women.

Table 2A. Distribution of systolic blood pressure, cross-tabulated by age and pill use.

Blood Pressure

(mm) Age 35-44

Non-Users Users

% %

Under 90 1 1

91-95 2 1

96-100 5 4

101-105 9 5

106-110 11 7

111-115 15 12

116-120 16 14

121-125 9 11

126-130 10 11

131-135 8 10

136-140 5 7

141-145 4 6

146-150 2 5

151-155 1 3

156-160 1 1

160 and over 1 2

Total Percent 100 100

Total Number 3,494 1,028

First, state whether blood pressure in Table 2A would be a continuous variable or a discrete variable. Explain. Then supposing that the number of women in each of groups (non-users and users) were identified, would the number of women in each category be a continuous variable or a discrete variable? Explain.

Part 2: Use any free online histogram maker* to draw Histograms for the blood pressures of the users and nonusers ages 35 - 44. Discuss one conclusion that can be made about blood pressure and pill use. *Here are some free resources:

http://www.zweigmedia.com/RealWorld/stats/histogram.html

Part 3: Based on what you’ve learned in this module about normal distributions, explain why a normal approximation of data would be helpful to view the data. For example, you could describe the steps that one would take to estimate the percentage of women with blood pressures in an age group.

Assignment Expectations

Use the information in the modular background readings as well as resources you find through ProQuest or other online sources. Please be sure to cite all sources and provide a reference list at the end of the paper. Submit the paper as a Word document through the link provided for the assignment.

Length: 2–3 pages typed and double-spaced.

Your Case paper will be further evaluated based on the following criteria:

Precision (Excellent; Good; Average; Poor)

•Each question and or assignment requirement is addressed in the paper.

•Accuracy of your answers, key points and supporting discussion

Clarity (Excellent; Good; Average; Poor)

•The paper is well organized, concise, reads clearly, and it is not confusing.

CONTENT:

NORMAL CURVES, VARIABILITY, AND PLOTTING Name Course Institution Instructor Date Part A: Continuous variable vs. discrete variable The Blood Pressure (mm) as presented in the table is a continuous variable given that the blood pressure would take any value ranging from below 90mm to the highest being 160 mm and more. This shows that the blood pressure would only fall within this range as it is not finite. In any case, the measurement of blood pressure tends to be more accurate depending on the measurement equipment tool used with accuracy expressed up to the decimal points. As such, the blood pressure interval represents the possibilities that would be expected if the measurement is accurate. This contrasts with discrete variables that are counted and less likely to be measured, while discrete variables measured to exact precision share similar characteristics with continuous variables. A discret

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