Test Quiz - Stat Modeller

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Which of the following will not generate the Logical Vector?

logical <- c(T, F, F, T, F)

log1 <- c(TRUE, FALSE, FALSE, TRUE, FALSE)

log1 <- c("T", "F", "F", "T", "F")

logi1 <- c(T, F, F, T, F)

None

Researcher is collecting data of Gender (Male, Female). Which type of data it is?

Ordinal

Nominal

Ratio

Interval

None

Which is the command to create a histogram using a base package?

plot(x)

graph(x)

hist(x)

histogram(x)

None

List can hold only similar data types.

True

False

None

To get descriptive statistics in one command, we can use _____________.

descriptive()

describe()

summary()

statistics()

None

Which package is required to import data from Excel in R?

read_excel

excelpackage

readr

readxl

None

What is the command in R to check data type of the object?

class()

datatype()

dtype()

showdata()

None

Which of the following are the Homogeneous structure in R? [Select all applicable]

Array

Matrix

List

Vector

What is the command to see the current working directory?

getwd()

setwd()

getcwd()

currentwd()

None

To remove any object from the Global Environment, we can use __________ command.

rm()

eliminate()

delete()

del()

None

You want to generate numbers in R which are alternate number from 1 to 100. Which command you will use?

sequence

repeat

seq

rep

None

How to prepare scatter plot using a base package?

scatter()

xy()

point()

plot()

None

Mr. Gupta is collecting data of States of the respondents, what type of data it will be in R?

state

complex numbers

alphabet

character

None

To add interactivity to the charts prepared using ggplot2 package, we can use ________ package.

Readxl

Ggplotly

Plotly

DataExplorer

None

Which of the following gives warning while creating matrix?

M1 <- matrix(1:5, nrow = 3, ncol = 2)

M1 <- matrix(1:10, nrow = 5, ncol = 2)

M1 <- matrix(1:6, nrow = 3, ncol = 2)

M1 <- matrix(1:9, nrow = 3, ncol = 3)

None

Which chart is suitable when there are two quantitative variables?

Histogram

Box Plot

Clustered Bar Chart

Scatter Plot

None

To get list of all the variables in the Global Environment, you have to use __________ command.

global()

list_variables()

list()

ls()

None

You can perform graphical analysis in R

True

False

None

In matrix, what is the the role of "byrow = T" argument?

It will not arrange data row wise

It will keep only rows

It will arrange data row wise

It will eliminate rows

None

Which of the following are the Heterogeneous structure in R? [Select all applicable]

Vector

Data Frame

Array

List

Which command is used to import data from the CSV file in R?

import.csv()

read_csv()

import_csv()

read.csv()

None

Data on intelligence level is collected as High, Medium and Low. Which type of data it is?

Interval

Ratio

Ordinal

Nominal

None

To clear console, we can use ________ command (in Windows system)

Ctrl + L

Ctrl + M

Ctrl + C

Ctrl + D

None

Which argument is used to give column and row name in the matrix?

row_name()

column_name()

dimnames()

column()

None

Which command is used to create a data frame?

data.frame()

dataframe()

create data frame()

data_frame()

None

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