sum()
mode()
median()
sum()
Answer is Wrong!
Answer is Right!
The correct answer is B. mode().
The mode is the most frequent value in a set of data. It is calculated by finding the value that appears the most times in the data.
The sum() method calculates the sum of all the values in a column.
The median is the middle value in a sorted set of data.
The sum() method is not used to calculate the mode of a numerical column in a DataFrame.