Statistical Analysis with R (Distributions, Graphics) MCQ question and answer with solution

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Learn Statistical Analysis with R (Distributions, Graphics) MCQ Questions and answers with easy and logical explanations in R Programming. Statistical Analysis with R (Distributions, Graphics) MCQ question provides all type of technical mcq questions which is important for technical exams, campus exams and other entrance examination. Page-3 section-1

How do you create a kernel density plot in R for a numeric variable values?

A) plot_kernel_density(values) B) geom_density(mapping = aes(x = values)) C) density_plot(values, kernel = TRUE) D) kde(values)

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Answer & Solution

Answer: Option C

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What is the purpose of the barplot() function in R?

A) Creates a bar plot for a categorical variable B) Generates random bars in a plot C) Plots a probability distribution function D) Computes the mean and standard deviation of a variable

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Answer & Solution

Answer: Option A

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How do you generate random numbers from a Poisson distribution in R with parameter lambda?

A) rpois(lambda) B) poisson_random(lambda) C) random_poisson(lambda) D) generate_poisson(lambda)

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Answer & Solution

Answer: Option A

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In R, what does the plot() function do when applied to a linear regression model?

A) Plots the residuals against the fitted values B) Creates a scatter plot of the model predictions C) Plots the model coefficients D) Generates a summary plot for the model

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Answer & Solution

Answer: Option A

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How do you calculate the mode of a numeric variable named variable in R?

A) mode(variable) B) calculate_mode(variable) C) modal_value(variable) D) compute(variable, "mode")

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Answer & Solution

Answer: Option A

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What is the role of the layout() function in R graphics?

A) Organizes multiple plots in a grid layout B) Adjusts the layout of the main plot and legend C) Defines the layout of a specific layer in a plot D) Creates a layout for a Shiny web application

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Answer & Solution

Answer: Option A

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In R, what does the polygon() function do when used in a plot?

A) Draws a polygon on the plot B) Adds a polygonal shape to the legend C) Connects data points with straight lines D) Fills the plot background with a polygonal shape

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Answer & Solution

Answer: Option A

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How do you create a stem-and-leaf plot for a numeric variable values in R?

A) stemleaf(values) B) create_stemleaf(values) C) geom_stemleaf(mapping = aes(x = values)) D) plot_stemleaf(values)

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Answer & Solution

Answer: Option C

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What is the purpose of the pairs() function in R?

A) Creates scatter plots for all pairs of numeric variables B) Generates pairwise scatter plots and correlations C) Plots a matrix of bivariate scatter plots D) Adds pairs of points to an existing plot

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Answer & Solution

Answer: Option B

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How do you create a time series plot in R for a numeric variable values with corresponding time points time?

A) time_series(values ~ time) B) plot_time_series(values, time) C) geom_line(mapping = aes(x = time, y = values)) D) tsplot(values, time)

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Answer & Solution

Answer: Option C

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Statistical Analysis with R (Distributions, Graphics) MCQ question and answer with solution | R Programming MCQs