MCQs R Programming - R Frequently Asked Questions

January 15, 2022

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

Quiz about R Language

1. 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?

for(i in 1500)

for(i in 1:1500)

for(i in 1 & 1500)

for(i in 1, 1500)

2. In R the following are all atomic data types EXCEPT:

Character

Integer

Logical

Data frame

3. For the population y<-c(1,2,3,4,5), write the R command to find the median?

median{y}

median(y)

medians(y)

median[y]

4. 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.

dnorm(n, mean, sd)

pnorm(n, mean, sd)

rnorm(n, mean, sd)

rnorm(n, mean, var)

5. Suppose you want to simulate a coin toss 20 times in R. Write the command.

sample(("H", "T"), 20, replace=T)

sample(c("H", "T"), 200, replace=T)

resample(c("H", "T"), 20, replace=T)

sample(c("H", "T"), 20, replace=T)

6. For the population y<-c(1,2,3,4,5), write the R command to find the mean?

mean[y]

means(y)

mean{y}

mean(y)

7. Which is the R command for obtaining 1000 random numbers through normal distribution with mean 0 and variance 1?

rnorm(1000, 0, 1)

rnorm(0, 1, 1000)

norm(1000, 0, 1)

qnorm(0, 1, 1000)

8. What is the class of the object defined by the expression? x <- c(4,5,10)?

Numeric

Character

Integer

Logical

9. How sampling with and without replacement can be done using R?

with replacement: sample(y, size, replace=F)
without: sample(y, size, replace=F)

with replacement: sample(y, size, replace=F)
without: sample(y, size, replace=T)

with replacement: sample(y, size, replace=T)
without: sample(y, size, replace=F)

with replacement: sample(y, n, replace=F)
without: sample(y, n, replace=T)

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For More R Quiz, Visit R Language MCQs 1

R Frequently Asked Questions

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