Data Visualization in R: Histograms, Pie Charts, and Multiple Plots
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Questions and Answers

What is the function used to plot a histogram of the 'Sepal.Width' variable from the 'iris' dataset?

  • boxplot(iris$Sepal.Width)
  • barplot(iris$Sepal.Width)
  • hist(iris$Sepal.Width) (correct)
  • plot(iris$Sepal.Width)

Which function is used to create subsets of the 'iris' dataset for each species before plotting multiple histograms in a single chart area?

  • split(iris, Species)
  • subset(iris, Species == 'setosa')
  • subset(iris, iris$Species=='versicolor') (correct)
  • filter(iris, Species == 'versicolor')

Which of the following is NOT a common source of data for business intelligence and analysis?

  • Server-side scripting (correct)
  • Databases
  • Data streams and feeds
  • Web Scrapping

Who originally developed exploratory data analysis techniques?

<p>John Tukey (D)</p> Signup and view all the answers

What is the primary purpose of exploratory data analysis (EDA)?

<p>Discover patterns and anomalies in data (D)</p> Signup and view all the answers

How does exploratory data analysis (EDA) benefit stakeholders?

<p>By confirming they are asking the right questions (C)</p> Signup and view all the answers

What is data visualization?

<p>It is the graphical representation of information and data (C)</p> Signup and view all the answers

What role do data visualization tools play in the world of Big Data?

<p>They are essential for analyzing massive amounts of information and making data-driven decisions (C)</p> Signup and view all the answers

How is Python commonly used in relation to data visualization tools?

<p>Python is used in developing data visualization tools (B)</p> Signup and view all the answers

Which programming language and environment is widely used for statistical computing and graphics in data science?

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

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