
Clean your data with R - R programming for beginners
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in a systematic approach to data analysis?
Exploring the data
Visualizing the data
Cleaning the data
Analyzing the data
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a part of data cleaning?
Filtering data
Dealing with missing data
Installing software
Categorizing variables
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Tidyverse in R?
A statistical analysis tool
A collection of packages
A data visualization library
A machine learning framework
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the 'factor' data type represent in R?
A logical value
A numeric variable
A character string
A categorical variable
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why might you convert a character variable to a factor in R?
To perform mathematical operations
To improve data storage
To recognize it as categorical
To change its data type to numeric
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What function in R is used to identify duplicate rows in a dataset?
unique()
filter()
duplicated()
distinct()
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you remove duplicates using the Tidyverse in R?
Using the mutate() function
Using the distinct() function
Using the select() function
Using the filter() function
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