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Statistics: Unlocking the Power of Data Lock 5 Chapter 1 Collecting Data
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Statistics: Unlocking the Power of Data Lock 5 Section 1.1 The Structure of Data
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Statistics: Unlocking the Power of Data Lock 5 Outline Data Cases and variables Categorical and quantitative variables Explanatory and response variables Using data to answer a question
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Statistics: Unlocking the Power of Data Lock 5 Learning Goals Identify case and variables Identify variables as either categorical or quantitative Determine explanatory and response variables where appropriate
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Statistics: Unlocking the Power of Data Lock 5 Why Statistics? Statistics is all about DATA Collecting DATA Describing DATA – summarizing, visualizing Analyzing DATA Data are everywhere ! Regardless of your field, interests, lifestyle, etc., you will almost definitely have to make decisions based on data, or evaluate decisions someone else has made based on data
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Statistics: Unlocking the Power of Data Lock 5 Data Data are a set of measurements taken on a set of individual units Usually data is stored and presented in a dataset , comprised of variables measured on cases
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Statistics: Unlocking the Power of Data Lock 5 Intro Statistics Survey Data
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Statistics: Unlocking the Power of Data Lock 5 Cases and Variables We obtain information about cases or units . A variable is any characteristic that is recorded for each case. Cases could be people, animal (rat, monkey etc.), plant (wheat etc.), and other inanimate (plot of land, machine etc) on which we experiment Generally each case makes up a row in a dataset, and each variable makes up a column
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Statistics: Unlocking the Power of Data Lock 5 Intro Statistics Survey Data
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