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

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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?

John Tukey (D) Signup and view all the answers

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

Discover patterns and anomalies in data (D) Signup and view all the answers

How does exploratory data analysis (EDA) benefit stakeholders?

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

What is data visualization?

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

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

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

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

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

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

R (D) Signup and view all the answers