Two-way tables
Japanese school year: Elementary 4
What you learn
Learn how to organize data across two categories simultaneously using rows and columns in a two-way table. This format helps classify survey results, such as responses grouped by gender and preference. Familiarity with simple one-variable tables and accurate addition skills will ensure effective analysis.
Key points
This describes a two-way table (cross-tabulation). It organizes data by cross-classifying two different categories along rows and columns, making their mutual relationship visible at a glance.
This states the consistency rule for totals in a two-way table. The sum of row totals and the sum of column totals always match, equaling the grand total in the bottom-right corner.
This describes a reliable counting procedure for two-way tables. Checking each data entry individually and tallying it into the correct cell prevents omissions and double-counting.
Choose a set to practice.