# Descriptive Statistics -Central Tendency and Variability (Healthcare/Public Health)

Descriptive Statistics -Central Tendency and Variability (Healthcare/Public Health) custom essay

Descriptive Statistics -Central Tendency and Variability (Healthcare/Public Health)
Briefly discuss the concept of mode, mean, median. What is it? How is it calculated? When would we use each one?

Following are the resting pulses of subjects, reported in beats per minute. Calculate the mean resting pulse, rounded to the nearest beat. Be sure to show your work.

60 53 58 48 56 50 62 51 52

A hospital kept track of the birth weights of babies measured in grams. The results are shown below.

2824 2973 3015 3025 3041 3102 3189

Find the median birth weight in grams. Provide an interpretation of your results.

Last year, ten former employees of a company passed away. Their ages at death are listed below.

79 75 72 55 66 80 77 79 68 70

Find the Mode. Provide an interpretation of your results.

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Background info for assignment:

1. Michelson, S. & Schofield, T. (2002). Chapter 1: Description. Data Dispersion, Noise and Error (pages 18-26). In: The Biostatistics Cookbook: The Most User-Friendly Guide for the Bio/Medical Scientist. Kluwer Academic Publishers.

2. Norman, G., and Streiner, D. (2008). Chapter The Third: Describing the Data with Numbers: Measures of Central Dispersion. In: Biostatistics The Bare Essentials. 3rd Edition. BC Decker Inc. PMPH USA, Ltd. Shelton, CT. eISBN: 9781607950585 pISBN: 9781550093476. Available in Ebrary

3. McGraw Hill.com (yr. unknown). Chapter 2: Describing Data: Frequency Distributions and Graphic Presentation. Retrieved from http://highered.mcgraw-hill.com/sites/dl/free/0070880441/40846/Chapter2.pdf

5. The Johns Hopkins University and John McGready (2009). The Theoretical Sampling Distribution of the Sample Mean and Its Estimate Based on a Single Sample. Retrieved from http://ocw.jhsph.edu/courses/IntroBiostats/PDFs/IntroBiostats-sec3b_McGready.pdf

6. The Johns Hopkins University and John McGready (2009). Estimating Confidence Intervals for the Mean of a Population Based on a Single Sample of Size n: Some examples. Retrieved from http://ocw.jhsph.edu/courses/IntroBiostats/PDFs/IntroBiostats-sec3c_McGready.pdf

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