1 / 3
True or false?
Revisit a related concept ↗Evaluate survey quality
Evaluate sampling, question wording and weighting within a single study.
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Selection bias
2 min · Who enters a study can systematically distort its result.Double-barrelled question
2 min · Ask for one answer to two separate judgments.Social desirability
2 min · Answering as the person we would like to be.Missing data
2 min · Distinguish absent values from meaningful answers.Weighting
2 min · Adjust how much each observation contributes to an estimate.Think through a case
A municipality publishes a transport survey only in its mobile app. It asks, “Are you satisfied with our fast and safe service?” Responses are weighted by age.
Answer three questions about the scenario below.
2 / 3
True or false?
Revisit a related concept ↗The question is leading and combines multiple dimensions in one answer.
3 / 3
True or false?
Revisit a related concept ↗Trying another channel to reach non-users is a reasonable way to investigate coverage.
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Put this learning path into practice.
Choose a guide connected to the concepts in this path. These optional activities do not count towards your reading progress.
Zotero3 min read
Merge duplicate references
Organize repeated records of the same publication.
Connected concepts in this path: Missing data
Google Scholar3 min read
Follow a citation trail
Find further research from a relevant publication.
Connected concepts in this path: Selection bias
Microsoft Forms3 min read
Pretest branching
Catch incorrect routing in conditional questions.
Connected concepts in this path: Missing data
Excel3 min read
Count categories with a PivotTable
Find how many records fall in each category.
Connected concepts in this path: Missing data
Google Sheets3 min read
Inspect blanks with a filter
Examine missing values before deleting anything.
Connected concepts in this path: Missing data
SPSS3 min read
Read a frequency table
Check category distributions and missing responses.
Connected concepts in this path: Missing data
R3 min read
Count categories including missing values
See category counts and NA values together.
Connected concepts in this path: Missing data
Python3 min read
Take a first look at your CSV
Inspect columns and missing-value counts with Python and pandas.
Connected concepts in this path: Missing data
OpenAI Signals4 min read
Read the data dictionary before analyzing
Use the OpenAI Signals dictionary to distinguish row units, measures and comparison groups.
Connected concepts in this path: Weighting