Data Mining vs Predictive Analytics Challenges
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Questions and Answers

What is the primary goal of visualization in data exploration?

  • To amplify cognition for discovery and decision making (correct)
  • To create complex graphs
  • To decorate reports
  • To summarize data
  • What type of graph is used to summarize quantitative/numeric data?

  • Scatterplot
  • Histogram
  • Boxplot (correct)
  • Pie chart
  • What is the name of the dataset used in the in-class exercise?

  • Car dataset
  • Iris dataset (correct)
  • Diamonds dataset
  • Student dataset
  • What is the purpose of the head() function in data exploration?

    <p>To look at the first few rows of data with column names</p> Signup and view all the answers

    What type of graph is used to display the distribution of a single variable?

    <p>Histogram</p> Signup and view all the answers

    What is the name of the function used to create a graph layer in ggplot2?

    <p>ggplot()</p> Signup and view all the answers

    What is the purpose of the aes() function in ggplot2?

    <p>To define an aesthetic</p> Signup and view all the answers

    What is the name of the dataset used in the ggplot2 examples?

    <p>Diamonds dataset</p> Signup and view all the answers

    What is the purpose of facet_wrap() in ggplot2?

    <p>To segment data</p> Signup and view all the answers

    What is the first step in the protocol for data exploration?

    <p>Look at the first few rows of data with column names</p> Signup and view all the answers

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