Challenge 29 - Comparing Distributions between Groups - Solution

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Imagine that you want to compare student test scores to find out whether there are any differences between the students' performances in 2020 (group 1) compared to 2019 (group 0). For example, you might want to find out whether there is an unusually high number of very good scores compared to the other year, which could be a sign of cheating. Each student participated in the same three tests and received three test scores (Score 1, Score 2, and Score 3). How similar are the distributions of the three scores between the two groups? Which score distribution differs the most? The output should contain a visualization of the conditional distributions and a statistical test for the equality of mean and variance between the groups.

Hint: Check out the verified components for visualization on the KNIME Hub.

Nodes

• Column Selection Configuration2 ×
• Component Input2 ×
• Component Output2 ×
• Auto-Binner1 ×
• Column Filter1 ×
• Column Rename1 ×
• Column Selection Widget1 ×
• Create Collection Column1 ×
• GroupBy1 ×
• Independent groups t-test1 ×
• Integer Configuration1 ×
• Line Plot (Plotly)1 ×
• Merge Variables1 ×
• Missing Value1 ×
• Pivoting1 ×
• Refresh Button Widget1 ×
• Rule Engine Variable1 ×
• String Configuration1 ×
• String To Number1 ×
• Table Manipulator1 ×
• Table Reader1 ×
• Table Row to Variable1 ×
• Variable to Table Row1 ×

Extensions

• FeatureKNIME Base nodes
• FeatureKNIME JavaScript Views
• FeatureKNIME Javasnippet
• FeatureKNIME Quick Forms
• FeatureKNIME Statistics Nodes

Links

• No links available