Google Data Analytics Professional Certification Practice Test

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Prepare for the Google Data Analytics Professional Certification Test. Study with interactive quizzes that include flashcards and multiple-choice questions, complete with hints and detailed explanations. Ensure your readiness for the exam!

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What is the function of tidyr in R?

To assist in data visualization
To import data from various sources
To clean and tidy data
To perform statistical analysis

The correct answer is: To clean and tidy data

Tidyr is a package in R specifically designed to help users clean and organize data. The primary function of tidyr is to transform data into a tidy format, which is essential for effective data analysis and visualization. In tidy data, each variable should have its own column, each observation should have its own row, and each type of observational unit should have its own table. Tidyr provides functions such as `gather()`, `spread()`, `separate()`, and `unite()` that facilitate the restructuring of datasets, making it easier to work with in data analysis workflows. Data visualization, importing data from various sources, and performing statistical analysis are tasks that can be accomplished with other packages in R, but are not the focus of tidyr. While tidyr aids in preparing data for visualization and analysis, its core function is ensuring that the data is in the right structure, which is crucial for getting accurate results in any data-centric task.