Module 8

Population and Group-Size Weights

Use group size as a precision weight.

Loading notebook...heteroskedasticityrobust standard errorsPythonstatsmodels

Notebook lab guide

Related dataset

MODULE8_WLS_GROUP_MEANS

Estimated time

25 to 40 min

Packages

pandas, numpy, statsmodels, patsy

Expected output

Printed Python results that can be compared with the lesson explanation.

Learning goals

Load and inspect MODULE8_WLS_GROUP_MEANS.
Run the Python cells connected to Group Means, Population Weights, and Aggregated Data.
Interpret the output using heteroskedasticity and robust standard errors.

Common errors

File not found: check that module8_wls_group_means.csv is installed or use the course data folder.
Package import error: use the browser notebook first, then download for local Jupyter if your local packages differ.
Column name error: compare your variable names with the dataset variables listed for this notebook.

Dataset path helper

import pandas as pd

df = pd.read_csv("/data/module-8/module8_wls_group_means.csv")
df.head()

Loading notebook runner...