FDA FINAL QUIZ

Which of the following is NOT a basic data type in R?

• Numeric

• Integar

• String

• Logical

Given the following vector: my_vector <- c(1, 2, 3, 4, 5), what will length(my_vector) return?

• 1

• 5

• 4

• 6

Which R function is used to convert a character to a numeric data type?

• as.numeric()
• to.numeric()
• convert.numeric()
• change.numeric()

In Multiple Linear Regression, the dependent variable is:

• The variable you want to predict

• A function of a single independent variable
• An additional variable for accuracy

• A constant value

The summary() function in R provides:

• A detailed report of the dataset

• A graphical representation of the data

• A summary of the statistical analysis
• A list of all the variables in the dataset

What is the correct way to fit a multiple linear regression model in R using the lm() function?

• lm(y ~ x1 + x2 + x3, data = mydata)
• lm(x1 + x2 + x3, y, data = mydata)
• lm(y ~ x1, x2, x3, data = mydata)
• lm(y, x1 + x2 + x3, data = mydata)

Which R function is used to sort a vector in ascending order?

• sort()
• order()
• ascending()

• arrange()

What function in R is used to find the unique values in a vector?

• unique()
• distinct()
• find_unique()
• get_unique()

To remove duplicate rows from a data frame in R, you can use the function:

• removeDuplicates()
• dropDuplicates()
• distinct()
• uniqueRows()

Which R package provides a set of functions for data manipulation and summarization, including filter(), select(), mutate(), and summarize()?

• dplyr
• ggplot2
• shiny
• tidyverse