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Data Mining vs Predictive Analytics Challenges

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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?

To look at the first few rows of data with column names (C) Signup and view all the answers

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

Histogram (D) Signup and view all the answers

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

ggplot() (C) Signup and view all the answers

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

To define an aesthetic (A) Signup and view all the answers

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

Diamonds dataset (C) Signup and view all the answers

What is the purpose of facet_wrap() in ggplot2?

To segment data (D) Signup and view all the answers

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

Look at the first few rows of data with column names (C) Signup and view all the answers