What DataFrame?

What this pandas DataFrame statistics question tests

This is a straightforward Python question that checks whether you know the standard pandas method for generating summary statistics across columns. It is a foundational skill for anyone working with tabular data in quantitative finance, data science, or research roles.

The question probes familiarity with pandas' built-in descriptive statistics functions and whether you can quickly retrieve aggregated metrics like mean, standard deviation, quantiles, and range without writing custom loops. In practice, this is often one of the first exploratory steps when loading and inspecting a dataset.

• DataFrame aggregation methods
• Column-wise vs. row-wise operations
• Interpreting summary statistics output