ANOVA Test
Use: ANOVA is used to compare the means of three or more groups to see if there's a statistically significant difference between them. It assesses whether there are any statistically significant differences between the means of two or more independent (unrelated) groups.
Example: A food manufacturer wants to determine if there are differences in the taste preferences of consumers for multiple variations of a product, like regular, low-fat, and organic.
Column Requirement: Continuous data is required for multiple independent groups.
Steps:
Select a continuous variable (e.g., test scores) and a categorical variable (e.g., treatment groups).
Ensure that the data meets the assumptions of normality and homogeneity of variance across groups.
Perform the ANOVA test and obtain the p-value.
A low p-value indicates that there are significant differences among the group means.
If the ANOVA is significant, conduct post-hoc tests (e.g., Tukey HSD) to identify specific group differences.
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