II Problem Solving

profileherlooe8a13
ProblemSolvingAssignment2.docx

PUH 5302, Applied Biostatistics

Unit II Problem Solving Assignment

This assignment will allow you to demonstrate the following objectives:

· 2.1 Compute the appropriate data to compare the extent of disease between groups.

· 2.2 Summarize data collection in a sample.

Instructions: In this assignment, you will be applying the concepts of quantifying the extent of a disease and summarizing data collected that you have learned in this unit. To complete this assignment, answer the questions directly on this document. When you are finished, select “Save As,” and save the document using this format: Student ID_Unit# (ex. 1234567_UnitI). Upload this document to Blackboard as a .doc, docx, or .rtf file.

1. A study was devised to show the relationship between prevalent hypertension and prevalent cardio vascular disease (CVD) in a heart study among a sample of 3986 participants. The following results were obtained for prevalent hypertension and prevalent CVD.

No CVD

Have CVD

Total

No hypertension

2655

300

2955

Hypertension

750

281

1031

Total

3405

581

3986

Calculate the following and interpret your results:

a. Point prevalence of participants with CVD

b. Population attribution risk of participants

c. Odds ratio for the participants

d. Risk difference of CVD for persons with as compared to those without hypertension.

e. Relative risk of CVD for persons with as compared to those without hypertension.

2. A study was devised to estimate the mean total cholesterol level in adults 30 to 60 years old. A sample of 12 participants are selected, and their total cholesterol levels are measured as follows.

x

(x – mean)

(x – mean)2

120

230

120

121

200

231

235

221

120

212

221

120

Total =

Mode =

Variance =

Mean =

Median =

Standard deviation =

Fill in the table by inserting

a. Total cholesterol levels

b. Average or mean

c. Variance

d. Standard deviation

e. Mode

f. Median

Note:

Variance where n represents the total number of data (x values)

Variance numerator =∑(x – mean)2 = Sum of (x – mean)2

Standard deviation = square root of the variance