Lab_4_Anthropometry_MAP2012 - Lab 4 Anthropometry...

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48 Lab 4 Anthropometry - Objectives - Use statistical methods to predict the height of an individual using only the skull, arm bones, or femur. - Additional Items You Should Bring - Calculator Introduction Biological Anthropology is the study of human variation and our evolutionary origins. One way to study Biological Anthropology is using anthropometry . This term refers to a series of techniques to obtain exact, quantitative measurements of skeletal remains. For example, it includes determining the length of a skeletal bone or the volume of a skull. These measurements help in determining sex, age, ethnic affiliation, stature, and nutritional status, which provides a biological profile of the individual. Such techniques are therefore applicable to the fields of forensic anthropology and paleontology. In this lab, we will learn the methods and statistics biological anthropologists use to assess stature in forensic contexts. In order to assess stature, we must first quantify the typical range of variation observed in modern humans, which allows us to derive formulae to predict a range of height for an individual. Formulae are based on the strength of the correlation between two measurements of a skeleton, such as the length of the femur and the total height. The strength of these formulae depends upon how representative the individuals are of the population from which they were drawn [meaning, how much of the range of variation they exhibit]. In general, the more individuals you base your formulae upon, the more accurate your stature estimation will be. Remember, these formulae will always be population specific. For our purposes, we will be exploring the variation encompassed within the lab population – namely, you and your classmates! You will predict your own height based on a formula derived from the lab population and test the accuracy of the prediction against your real height. In addition, you will assess the importance of using population-specific formulae to estimate stature.
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49 Part 1. STATISTICS 1. Introduction to Statistical Methods For the purpose of introducing statistical methods we will begin with a simple example – comparing the height of two groups of students. We may wish to ask the following questions: Is there a difference in the "average height" of the two groups? How much does the height vary within each group? The easiest way to answer the question is to collect data by measuring the heights of each of the students. Suppose that there are 5 students in each group and the set of measurements is given in Table 1. Table 1: Heights for Two Groups of Students Group A Height (cm) Group B Height (cm) Student 1 175 Student 1 191 Student 2 168 Student 2 145 Student 3 175 Student 3 168 Student 4 183 Student 4 204 Student 5 175 Student 5 168 Although we are most comfortable discussing height in terms of feet and inches, science is dominated by the metric system - get used to it! 1.1 Inspecting the Data
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Lab_4_Anthropometry_MAP2012 - Lab 4 Anthropometry...

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