Q. The _________ function is used to generate summary statistics from the data frame within strata defined by a variable.

View solution

Q. Point out the wrong statement?

View solution

Q. Columns can be arranged in descending order too by using the special ____ operator.

View solution

Q. ________ function is similar to the existing subset() function in R but is quite a bit faster.

View solution

Q. Point out the correct statement?

View solution

Q. The _________ function can be used to select columns of a data frame that you want to focus on.

View solution

Q. Which of the following object is masked from ‘package: stats’?

View solution

Q. The dplyr package can be installed from CRAN using __________

View solution

Q. The dplyr package can be installed from GitHub using the _______ package.

View solution

Q. The _______ operator is used to connect multiple verb actions together into a pipeline.

View solution

Q. ________ add new variables/columns or transform existing variables.

View solution

Q. Point out the wrong statement?

View solution

Q. _________ generate summary statistics of different variables in the data frame, possibly within strata.

View solution

Q. _________ extract a subset of rows from a dataframe based on logical conditions.

View solution

Q. Point out the correct statement?

View solution

Q. Which of the following return a subset of the columns of a data frame?

View solution

Q. Point out the wrong statement?

View solution

Q. Point out the correct statement?

View solution

Q. Which of the following function gives the day of the week?

View solution

Q. Which of the following code represents internal representation of a Date object?

View solution