Lecture 1—Data Collection


Data collection is motivated by questions we want to answer


Today’s question: How far will a thing fling?


Make a guess as to how far you think a thing will fling


What are some factors that might affect how far your thing will fling?


Prior to collecting data, I must decide who or what will provide the data





4 Steps in Collecting Data


  1. Pose a question

-then I must decide who or what I am collecting data from

-Definition:  Observational Unit—the person or thing to which a number or category is assigned

(for us it was the table groups)


  1. Collect the data

-compare your data will a random list of numbers (e.g. 5, 8, 22, 13)

-what is the difference in the two lists?

-Definition:  Data—numbers collected in a particular context

  1. Analyze the data

-graphs/charts /tables are good ways to analyze your data

-we will spend a lot of time in the coming lectures discussing this

  1. Interpret the results

-go back and answer the question you initially posed

-recognize limitations


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