--- slug: /en/sql-reference/aggregate-functions/reference/analysis_of_variance sidebar_position: 6 --- # analysisOfVariance Provides a statistical test for one-way analysis of variance (ANOVA test). It is a test over several groups of normally distributed observations to find out whether all groups have the same mean or not. **Syntax** ```sql analysisOfVariance(val, group_no) ``` Aliases: `anova` **Parameters** - `val`: value. - `group_no` : group number that `val` belongs to. :::note Groups are enumerated starting from 0 and there should be at least two groups to perform a test. There should be at least one group with the number of observations greater than one. ::: **Returned value** - `(f_statistic, p_value)`. [Tuple](../../data-types/tuple.md)([Float64](../../data-types/float.md), [Float64](../../data-types/float.md)). **Example** Query: ```sql SELECT analysisOfVariance(number, number % 2) FROM numbers(1048575); ``` Result: ```response ┌─analysisOfVariance(number, modulo(number, 2))─┐ │ (0,1) │ └───────────────────────────────────────────────┘ ```