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Questions and Answers
Which function is used to read data from a text file in R?
Which function is used to read data from a text file in R?
- read.table (correct)
- read.xlsx
- read.json
- read.csv
What is the default value for the header
argument in the read.csv
function?
What is the default value for the header
argument in the read.csv
function?
- FALSE
- NA
- TRUE (correct)
- NULL
Which function is used to view the first 6 rows of a data frame in R?
Which function is used to view the first 6 rows of a data frame in R?
- tail()
- head() (correct)
- names()
- dim()
What does the dim()
function in R return?
What does the dim()
function in R return?
Which function is used to create a vector in R?
Which function is used to create a vector in R?
What does the length() function return?
What does the length() function return?
How do you access items in a matrix using index numbers?
How do you access items in a matrix using index numbers?
Which function is used to add columns to a matrix in R?
Which function is used to add columns to a matrix in R?
Which function can be used to export data as a text file in R?
Which function can be used to export data as a text file in R?
What is the most convenient and standard representation for data analysis in R?
What is the most convenient and standard representation for data analysis in R?
Which of the following is an example of qualitative data?
Which of the following is an example of qualitative data?
Which data structure is commonly used in R for organizing tabular data?
Which data structure is commonly used in R for organizing tabular data?
What is the difference between ordinal and nominal data?
What is the difference between ordinal and nominal data?
What types of features/attributes are important to recognize in tabular data?
What types of features/attributes are important to recognize in tabular data?
Which of the following is an example of continuous data?
Which of the following is an example of continuous data?
What are the possible categories for binary data?
What are the possible categories for binary data?
Which function is used to create a factor in R?
Which function is used to create a factor in R?
Which function is used to access items in a data frame column in R?
Which function is used to access items in a data frame column in R?
What is the purpose of the summary() function in R?
What is the purpose of the summary() function in R?
What is the correct way to remove the first row and column from a data frame in R?
What is the correct way to remove the first row and column from a data frame in R?
Which of the following is a valid object name in R?
Which of the following is a valid object name in R?
What is the data type of the object 'x' after executing the code 'x <- 5.5' in R?
What is the data type of the object 'x' after executing the code 'x <- 5.5' in R?
Which R data structure is used to store a list of items of the same type?
Which R data structure is used to store a list of items of the same type?
What does the function 'str(dat)' do in R?
What does the function 'str(dat)' do in R?
Which type of attribute can be split further into two types: symmetric or asymmetric based on whether or not their values are equally informative?
Which type of attribute can be split further into two types: symmetric or asymmetric based on whether or not their values are equally informative?
Which type of attribute can be split into two types: interval and ratio?
Which type of attribute can be split into two types: interval and ratio?
Which type of attribute can be split into discrete and continuous ones?
Which type of attribute can be split into discrete and continuous ones?
Which operations can be applied to every type of attribute except nominal?
Which operations can be applied to every type of attribute except nominal?
Which operations can be applied to only ratio attributes?
Which operations can be applied to only ratio attributes?
Which operations may also be inapplicable for some attributes?
Which operations may also be inapplicable for some attributes?
Which function is used to check the data type of an object in R?
Which function is used to check the data type of an object in R?
What is the data type of the object 'hp' in the given data frame?
What is the data type of the object 'hp' in the given data frame?
Which R data structure is commonly used for organizing tabular data?
Which R data structure is commonly used for organizing tabular data?
What is the purpose of the summary() function in R?
What is the purpose of the summary() function in R?
Which of the following is an example of quantitative data?
Which of the following is an example of quantitative data?
What is the difference between ordinal and nominal data?
What is the difference between ordinal and nominal data?
Which of the following is an example of binary data?
Which of the following is an example of binary data?
Which type of attribute can be split into two types: interval and ratio?
Which type of attribute can be split into two types: interval and ratio?
Which function is used to import data from a CSV file in R?
Which function is used to import data from a CSV file in R?
What is the purpose of the names()
function in R?
What is the purpose of the names()
function in R?
Which function is used to check the class of each column in a data frame in R?
Which function is used to check the class of each column in a data frame in R?
What does the dim()
function in R return?
What does the dim()
function in R return?
Which function is used to create a vector in R?
Which function is used to create a vector in R?
Which function is used to access items in a data frame column in R?
Which function is used to access items in a data frame column in R?
What does the length() function return in R?
What does the length() function return in R?
What does the dim() function in R return?
What does the dim() function in R return?
Which function is used to create a factor in R?
Which function is used to create a factor in R?
What does the dim()
function in R return?
What does the dim()
function in R return?
What is the correct way to remove the first row and column from a data frame in R?
What is the correct way to remove the first row and column from a data frame in R?
What does the length() function return?
What does the length() function return?
Which function is used to export data as a text file in R?
Which function is used to export data as a text file in R?
What is the correct way to remove the first row and column from a data frame in R?
What is the correct way to remove the first row and column from a data frame in R?
What type of attribute can be split into two types: interval and ratio?
What type of attribute can be split into two types: interval and ratio?
What is the purpose of the summary() function in R?
What is the purpose of the summary() function in R?
Which type of attribute can be split further into two types: symmetric or asymmetric based on whether or not their values are equally informative?
Which type of attribute can be split further into two types: symmetric or asymmetric based on whether or not their values are equally informative?
Which type of attribute can be split into two types: interval and ratio?
Which type of attribute can be split into two types: interval and ratio?
Which operations can be applied to every type of attribute except nominal?
Which operations can be applied to every type of attribute except nominal?
What is the purpose of the summary() function in R?
What is the purpose of the summary() function in R?
Which function is used to read data from a text file in R?
Which function is used to read data from a text file in R?
What does the length() function return?
What does the length() function return?
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