Practical Data Science using Python - Pandas Series 4

The video tutorial covers operations on series and data frames, including rounding, standard deviation, and string manipulation using the replace function. It explains arithmetic operations like subtraction between series, and conversions between series, dictionaries, and Excel files. The tutorial also discusses converting series to lists, truncating elements, extracting unique values, and calculating variance. Finally, it introduces multi-indexed series, detailing how to create and access them.

What does the round function do when applied to a series object?

• It converts all values to integers.

• It removes all decimal places from the values.

• It rounds values to a specified number of decimal places.

• It converts all values to strings.

Which function is used to replace string values within a series?

• replace

• swap

• change

• modify

What is the purpose of the sub function in series operations?

• To subtract elements of one series from another.

• To multiply elements of two series.

• To add elements of two series.

• To divide elements of one series by another.

How are series objects similar to dictionary objects?

• Both store data in key-value pairs.

• Both are immutable.

• Both can be converted to lists.

• Both can have duplicate keys.

What does the to_dict method do?

• Converts a series to a list.

• Converts a series to a string.

• Converts a series to a dictionary.

• Converts a series to a DataFrame.

What is the result of using the truncate method on a series?

• It duplicates elements in the series.

• It sorts the elements in the series.

• It adds new elements to the series.

• It removes elements from the series.

What does the unique function return when applied to a series?

• Only the duplicate elements.

• Only the unique elements.

• The sum of all elements.

• All elements in the series.

How can you calculate the variance of a series?

• By using the mean function.

• By using the variance function.

• By using the sum function.

• By using the unique function.

What is a multi-index series object?

• A series with only one index.

• A series with multiple values.

• A series with multiple levels of indexes.

• A series with no indexes.

How can you access a specific record in a multi-index series?

• By using both index levels.

• By using the index name.

• By using the index number.

• By using the series length.