R Language Quiz

Important MCQs R Language Quiz 9

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The post is about MCQ on R Language Quiz with Answers. The quiz covers the topics related to R Package qqplot, R Studio, and Data.Frame. Let us start with the MCQs R Language Quiz.

Online Multiple Choice Questions about Learning R Programming. It will help the learners to get knowledge of R not only for learning the language but also to get some practices about Statistics with reference to R Programming.

1. What function can you use to put a text label inside the grid of your plot to call out specific data points?

 
 
 
 

2. Data frames can be converted to a matrix by calling data.

 
 
 
 

3. Which package is associated with data visualization in R?

 
 
 
 

4. When creating a plot in ggplot you must set the mapping argument of a function. Which function has the mapping argument?

 
 
 
 

5. Which of the following is NOT a valid data structure in R?

 
 
 
 

6. Which of the following are the benefits of using ggplot2?

 
 
 
 

7. Which of the following aesthetics attributes can you map to the data in a scatterplot?

 
 
 
 

8. What is the role of the x argument in the following code?

ggplot(data = diamonds) +
       geom_bar(mapping = aes(x = cut))
 
 
 
 

9. In ggplot2, you use the plus sign (+) to add a layer to your plot.

 
 

10. What is the purpose of the rep() function in R?

 
 
 
 

11. Which ggplot function is used to define the mappings of variables to visual representations of data?

 
 
 
 

12. The _________ creates a scatterplot and then adds a small amount of random noise to each point in the plot to make the points easier to find.

 
 
 
 

13. Which of the following are operations you can perform in ggplot2?

 
 
 
 

14. Which of the following are operations you can perform in ggplot2?

 
 
 
 

15. Which statement about the ggsave() function is correct?

 
 
 
 

16. Which of the following are the benefits of adding labels and annotations to your plot?

 
 
 
 

17. In R studio, what default options does the Export functionality of the Plots tab give for exporting plots?

 
 
 
 

18. What does the data.frame function do in R?

 
 
 
 

19. What argument of the labs() function can a data analyst use to add text outside of the grid area of a plot?

 
 
 
 

20. A data analyst is working with the penguin’s data. The analyst creates a scatterplot with the following code:

ggplot(data = penguins) +
       geom_point(mapping = aes(x = flipper_length_mm, y = body_mass_g, alpha = species))

What does the alpha aesthetic do to the appearance of the points in the plot?

 
 
 
 

MCQs R Language Quiz

  • Which of the following aesthetic attributes can you map to the data in a scatterplot?
  • What is the role of the x argument in the following code?
    ggplot(data = diamonds) +
    geom_bar(mapping = aes(x = cut))
  • Which of the following are the benefits of adding labels and annotations to your plot?
  • What function can you use to put a text label inside the grid of your plot to call out specific data points?
  • Which of the following are operations you can perform in ggplot2?
  • When creating a plot in ggplot you must set the mapping argument of a function. Which function has the mapping argument?
  • Which ggplot function is used to define the mappings of variables to visual representations of data?
  • Which of the following are the benefits of using ggplot2?
  • What argument of the labs() function can a data analyst use to add text outside of the grid area of a plot?
  • Which statement about the ggsave() function is correct?
  • A data analyst is working with the penguin’s data. The analyst creates a scatterplot with the following code:
    ggplot(data = penguins) +
    geom_point(mapping = aes(x = flipper_length_mm, y = body_mass_g, alpha = species))
  • What does the alpha aesthetic do to the appearance of the points in the plot?
  • The ___________ creates a scatterplot and then adds a small amount of random noise to each point in the plot to make the points easier to find.
  • In R studio, what default options does the Export functionality of the Plots tab give for exporting plots?
  • Which of the following are operations you can perform in ggplot2?
  • In ggplot2, you use the plus sign (+) to add a layer to your plot.
  • Which of the following is NOT a valid data structure in R?
  • What is the purpose of the rep() function in R?
  • Which package is associated with data visualization in R?
  • What does the data.frame function do in R?
  • Data frames can be converted to a matrix by calling data.
Frequently Asked Questions About MCQs R Language Quiz

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Important R Language MCQs ggplot2 with Answers 8

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The quiz “R Language MCQS ggplot2” will help you check your ability to execute some basic operations on objects in the R language, and it will also help you understand some basic concepts. This quiz may also improve your computational understanding.

Please go to Important R Language MCQs ggplot2 with Answers 8 to view the test

Frequently Asked Questions About R Language MCQs ggplot2

R Language MCQs ggplot2 Function

  • What is the class of the object defined by the expression? x <- c(4,5,10)?  
  • In R the following are all atomic data types EXCEPT:
  • For the population y<-c(1,2,3,4,5), write the R command to find the mean.
  • For the population y<-c(1,2,3,4,5), write the R command to find the median.
  • Let us have 1000 random samples of size 6 under SRSWOR using the following population (111, 150, 121, 198, 112, 136, 114, 129, 117, 115, 186, 110, 121, 115, 114) which is the R command for repeating this procedure 1500 times?
  • Which is the R command for obtaining 1000 random numbers through normal distribution with mean 0 and variance 1?
  • How sampling with and without replacement can be done using R?
  • Write the R commands for generating 700 random variables from normal distribution by using the following information: Mean = 14, SD = 3, n = 5, k = 2000.
  • Suppose you want to simulate a coin toss 20 times in R. Write the command.
  • When programming in R, what is a pipe used as an alternative for?
  • Which of the following are standards of tidy data?
  • Which summary functions can you use to preview data frames in R Language?
  • Which R function can be used to make changes to a data frame?
  • Why are tibbles a useful variation of data frames?
  • Data analysts are cleaning their data in R.
  • They want to be sure that their column names are unique and consistent to avoid any errors in their analysis. What R function can they use to do this automatically?
  • Data analysts are working with customer information from their company’s sales data. The first and last names are in separate columns, but they want to create one column with both names instead. Which of the following functions can they use?
  • A data scientist is trying to print a data frame but when you print the data frame to the console output produces too many rows and columns to be readable. What could they use instead of a data frame to make printing more readable?
  • A data analyst is working with the penguin’s data. They write the following code: penguins %>% The variable species includes three penguin species: Adelie, Chinstrap, and Gentoo. What code chunk does the analyst add to create a data frame that only includes the Gentoo species?
  • You are cleaning a data frame with improperly formatted column names. To clean the data frame you want to use the clean_names() function. Which column names will be changed using the clean_names() with default parameters?
  • In ggplot2, an ———- is a visual property of an object in your plot.

R Language MCQs 2

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R Basics Online Quiz 7

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R Basics Online Quiz: The R language is a free and open-source language developed by Ross Ihaka and Robert Gentleman in 1991 at the University of Auckland, New Zealand. The R Language is used for statistical computing and graphics to clean, analyze, and graph your data. Let us start with the R Basics Online Quiz.

Please go to R Basics Online Quiz 7 to view the test

Frequently Asked Questions About R R Basics Online Quiz

R Basics Online Quiz with Answers

  • A sequence of integer values can be created using the operator
  • R is an ———— programming language
  • The ———— is your current R working environment that includes user-defined objects
  • Which of the following software is used for statistical analysis in R
  • R was named partly after the first names of ———— R authors.
  • The R console is a tool that is used to write (insert) standard
  • In R, an object name cannot start with
  • The file “.RData” in the current R session is
  • Which of the following describes R Language best
  • R Language functionality is divided into a number of ————
  • GUI stands for
  • What does CRAN stand for ————?
  • In 1991 R Language was created by Ross Ihaka and Robert Gentleman in the Department of Statistics at the University of ————.
  • ———— developed R language
  • Factors in R, are used to represent the
  • Which of the following functions can a data analyst use to get a statistical summary of their dataset?
  • A data analyst inputs the following command: quartet %>% group_by(set) %>% summarize(mean(x), sd(x), mean(y), sd(y), cor(x, y)). Which of the functions in this command can help them determine how strongly related their variables are?
  • In ggplot2, you can use the ———— function to specify the data frame to use for your plot.
  • What type of plot will the following code create? ggplot(data = penguins) + geom_point(mapping = aes(x = flipper_length_mm, y = body_mass_g))
  • A data analyst wants to create the date February 27th, 2027 using the lubridate functions. Which of the following are examples of code that would create this value?

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MCQs in Statistics