Quiz on Data Analysis for R (Unit-IV)

Individual values are addressed in a data frame using the_______

• Index Numbers

• Row Number

• Both index and row Number

The lines dividing the groups are called as ________

• First quartile

• Second quartile

• Third quartile

• Quartile

The _______ function can be used to control the appearance of X-axis ticks and labels

• scale()

• continuous()

• scale_x_continuous()

• All of the above

CSV stands for ____________

• Comma Separated Values

• Common Separated Values

• Comma Special Values

• Common Special Values

Subsets can be extracted from data frames by stating their row and column index numbers within_____

• ()

• []

• {}

• " "

_______ returns the top six rows of the data frame

• add()

• row()

• tail()

• head()

Which of the following function will draw shape and size of the points?

• factor()

• qplot()

• setwd()

• getwd()

The data contained in the cells of a data frame can be filtered by performing conditional test upon the values in each cell to select only data from cells where the conditional test returns____________

• false

• true

• rev

• merge

The RStudio working directory can be specified using the _____

• getwd()

• setwd()

• levels()

• colnames()

Box plots sort numerical data into ascending order separated in ____ equal sized quartile groups

• eight

• six

• four

• nine