Day 3

Which of the following is not a data type in R?

• a) Numeric

• b) Character

• c) Boolean

• d) Loop

What does the function "mean()" do in R?

• a) Returns the median of a dataset

• b) Returns the mode of a dataset

• c) Returns the mean of a dataset

• d) Returns the standard deviation of a dataset

What is the purpose of the function "read.csv()" in R?

• A) Writes data to a CSV file

• B) Reads data from a CSV file into R

• C) Computes summary statistics for a dataset

• D) None of the above

Which function is used to check the dimensions of a matrix or data frame in R?

• A) dim()

• B) length()

• C) nrow()

• D) class()

Which function is used to generate a random number from a normal distribution in R?

• A) rnorm()

• B) runif()

• C) rpois()

• D) rexp()

What does the function "table()" do in R?

• A) Computes the mean of a dataset

• B) Computes the standard deviation of a dataset

• C) Creates a contingency table from categorical variables

• D) Returns the maximum value in a dataset

Which function is used to calculate the absolute value of a number in R?

• A) abs()

• B) log()

• C) exp()

• D) sqrt()

What is the purpose of using data visualization tools?

• a) To create data models

• b) To calculate raw data

• c) To show the graphical representation of information and data

• d) To store and retrieve data

Which data visualization tool provides advanced statistical analysis capabilities?

• a) Excel

• b) Python

• c) Google Sheets

• d) SPSS

The following graph is an example of:

• a) Line graph

• b) Histogram

• c) Bar Chart

• d) Scatter Plot