Topic_3.0___Sampling_and_Measurement

# Topic_3.0___Sampling_and_Measurement - Sampling and...

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Sampling and Measurement Ash Genaidy

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Introduction The ultimate goals of any engineering study are to understand, explain and make inferences about engineering phenomena. To do this, we need data. Descriptive statistical methods provide ways of summarizing the data. Inferential statistical methods use sample data to make predictions about populations. To make inferences, we must decide which objects of the population to sample.
Introduction Selecting a sample that is likely to be representative of the population is the primary issue dealt with in this topic.

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Topic Outline Variables and their measurement Methods for sample selection
Variables Statistics is concerned with the study of variables which are characteristics that vary among individuals, machines and various subjects of interest to us in our everyday lives. The statistical methods used for a particular variable depend on whether it is qualitative or quantitative .

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Variables Numerically measured variables, such as pressure and temperature, are quantitative . They are said to be measured on an
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## This note was uploaded on 10/13/2010 for the course MINE 340 taught by Professor Geinady during the Summer '04 term at University of Cincinnati.

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Topic_3.0___Sampling_and_Measurement - Sampling and...

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