# 11.1.2 - Two-Way Contingency Table

11.1.2 - Two-Way Contingency Table**two-way contingency table** is a display of counts for two categorical variables in which the rows represented one variable and the columns represent a second variable. The starting point for analyzing the relationship between two categorical variables is to create a two-way contingency table. When one variable is obviously the explanatory variable, the convention is to use the explanatory variable to define the rows and the response variable to define the columns; this is not a hard and fast rule though.

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Minitab^{®}
– Constructing a Two-Way Contingency Table

- Open the data set: class_survey.mpx
- Select
*Stat > Tables > Cross Tabulation and Chi-square* - Select
*Raw data (categorical variable)*from the drop down menu - Double click the variable
*Smoke Cigarettes*in the box on the left to insert the variable into the*Rows*box - Double click the variable
*Biological Sex*in the box on the left to insert the variable into the*Columns*box - Click OK

This should result in the two-way table below:

##### Rows: Smokes Cigaretes | Columns: Biological Sex

Female | Male | All | |
---|---|---|---|

No | 120 | 89 | 209 |

Yes | 7 | 10 | 17 |

All | 127 | 99 | 226 |

Cell Contents: Count |