# ANOVA-Type Tests - Comparing Three or More Groups

(Redirected from ANOVA-Type Tests)

Jump to navigation
Jump to search
Related Online Training modules | |
---|---|

Column Comparisons | |

Planned Tests Of Statistical Significance | |

Generally it is best to access online training from within Q by selecting Help > Online Training |

*ANOVA-type tests* involve comparing three or more cells, most commonly in rows of a table. They are conducted automatically when:

**ANOVA-Type Test**is selected in in the**Column comparisons**settings of Statistical Assumptions.- When appropriate data is selected when pressing (i.e., when conducting Planned Tests Of Statistical Significance). See Planned ANOVA-Type Tests.
- When using Smart Tables with a Number question by a Pick One question.

There are two basic variants of these tests:

*Independent samples tests*, which compare data between different sub-groups. This is sometimes referred to as*One-Way ANOVA*and*One-Way Layouts*. In Q, these occur when you have- The table has numeric data in the rows (i.e., Number or Number - Multi question in the brown drop-down).
- The table has mutually exclusive categories within spans in the columns (i.e., has no NETs).

*Repeated measures tests*, where each respondent has provided multiple responses and these are to be compared (e.g., evaluations of different products). These are sometimes referred to as*Two-Way ANOVA*and*Two-Way Layouts*. In Q, these occur when you have a Pick One – Multi question selected in the blue drop-down menu with the variables appearing as the columns. (Where you wish to compare averages rather than categories, select Statistics – Below and Average.)

Additionally, whether the setting for **Means** in Statistical tests for categorical and numeric data is set to **Non-parametric** and the Question Type of the question in the blue drop-down are also determinants of how the tests are computed, as described in the table below.

Independent samples | Dependent samples | |
---|---|---|

Not Non-parametric and the data in the rows is numeric (i.e., Number or Number - Multi) |
F-Test (ANOVA) | Repeated Measures ANOVA with Greenhouse & Geisser Epsilon Correction . |

Non-parametric and the data in the rows is numeric (i.e., Number or Number - Multi) |
Kruskal-Wallis Test | Friedman Test for Correlated Samples |

Non-parametric and the data in the rows is categorical (Pick One, Pick Any or Pick Any - Compact) |
Pearson's Chi-Square Test of Independence | Cochran's Q |

Non-parametric and the data in the rows is mutually exclusive (e.g., choices on a rating scale) |
Pearson's Chi-Square Test of Independence | Chi-Square Test for Compatibility of K Counts |