Iris Data Analysis: Key Insights & Feature Importance

By abhishek.verma75000 · April 13, 2026

Petal measurements clearly dominate iris classification. Virginica stands out with the highest variability and largest size, while Setosa remains the most…

Virginica shows the most variability in petal length, making it the variety with the greatest morphological diversity. A box plot and data table have been generated to visualize the distribution of petal lengths across all three iris varieties.

Based on the bar chart and data table generated, Virginica produces the largest overall iris specimens when combining all four measurements (sepal length, sepal width, petal length, and petal width). The visualization clearly shows Virginica at the top, followed by Versicolor, with Setosa producing the smallest specimens overall.

The sepal length-to-width ratio varies significantly across the three iris varieties. A box plot and summary statistics were generated to illustrate these differences. Setosa has the most rounded sepals with a mean ratio of 1.47, while Versicolor sits in the middle at 2.16, and Virginica has the longest, narrowest sepals with the highest mean ratio of 2.23.

The petal length-to-width ratio reveals clear shape differences across the three iris varieties. A box plot and summary statistics were generated to illustrate these differences. Setosa has the most elongated, narrow petals (mean ratio: 6.91), while Virginica has the most rounded petals (mean ratio: 2.78), and Versicolor falls in between (mean ratio: 3.24).

The box plot and data table show the petal width distributions for each iris variety. You can see how the three varieties — Setosa, Versicolor, and Virginica — compare in terms of their petal width spread, median values, and individual data points.

Yes, but the strength varies by variety. Virginica and Versicolor show strong positive relationships between sepal length and petal length, while Setosa shows only a weak correlation. A data table summarizing these findings has been generated.

Virginica has the largest average petal length at 5.55 cm. It exceeds Versicolor by 1.29 cm and Setosa by a much larger margin of 4.09 cm, making Virginica's petals significantly longer than the other two varieties.

The analysis successfully computed and visualized the average measurement profiles for each iris variety across all four dimensions: sepal length, sepal width, petal length, and petal width. A grouped bar chart has been generated showing side-by-side comparisons for Setosa, Versicolor, and Virginica.

Based on the analysis, petal measurements (petal length and petal width) are significantly better at distinguishing between the three iris varieties — Setosa, Versicolor, and Virginica — compared to sepal measurements. Two data tables were generated showing the distribution and separation power of each measurement across the varieties.

The analysis examined all 150 iris specimens across the three varieties (Setosa, Versicolor, Virginica) to identify unusually large or small flowers based on their sepal and petal dimensions. Two visualizations were generated to help explore this: a grouped box plot showing the spread of all four measurements per variety with outlier points highlighted, and a scatter plot comparing sepal length vs. petal length with outlier specimens marked with an 'X' symbol.

The box plot and data table show how the three iris varieties rank by petal area (length × width). Virginica has the largest petals, followed by Versicolor in the middle, and Setosa with the smallest petal area by a significant margin.

Here are the 25th, 50th, and 75th percentile petal lengths for each iris variety: Setosa has very compact petals (25th=1.4cm, 50th=1.5cm, 75th=1.58cm), Versicolor falls in the middle (25th=4.0cm, 50th=4.35cm, 75th=4.6cm), and Virginica has the longest petals (25th=5.1cm, 50th=5.55cm, 75th=5.875cm). A grouped bar chart and data tables have been generated to visualize these distributions side by side.

The two extremes belong to different varieties! The specimen with the single longest petal (6.9 cm) is from the Virginica variety, while the specimen with the single widest sepal (4.4 cm) belongs to the Setosa variety.

The two iris varieties with the most overlapping measurements are Versicolor and Virginica , making them the hardest to distinguish from each other. Setosa, by contrast, is clearly distinct from both.

The stacked bar chart shows how total flower size is split between petals and sepals for each iris variety. Setosa flowers are heavily sepal-dominated, with roughly 82% of their total size coming from sepals. Virginica stands out as having the largest petal contribution among the three varieties, at around 46% petal proportion. Versicolor falls in between, showing a moderate balance between the two parts.

Setosa has the widest sepals on average at 3.43 cm — and yes, this does correlate with smaller petals! Setosa also has the smallest petals by far (petal length: 1.46 cm, petal width: 0.25 cm), while Virginica has the largest petals (petal length: 5.55 cm, petal width: 2.03 cm). Two charts and data tables were generated to visualize these patterns across all three varieties.

Yes, the three varieties are equally represented in the dataset. Each variety — Setosa, Versicolor, and Virginica — has exactly 50 samples, making up 33.3% of the total dataset each. This perfect balance means sample size does not affect comparisons between varieties. Two charts were generated: a bar chart showing equal counts per variety, and a box plot comparing feature distributions across all three varieties.

The analysis compared sepal shapes across iris varieties using the length-to-width ratio — a lower ratio means more compact (short and wide), while a higher ratio means more elongated. Two charts and a data table were generated to visualize the results. From the scatter plot and bar chart, Setosa has the most compact sepals (lowest L/W ratio), meaning they are relatively short and wide. Virginica has the most elongated sepals (highest L/W ratio), meaning they are longer and narrower relative to their width. Versicolor falls in between the two extremes.

A decision tree analysis was performed to distinguish Versicolor from Virginica iris flowers using sepal ratio (length/width) and petal ratio (length/width) as features. Two data tables were generated showing the feature distributions for both species, providing a foundation for understanding how these engineered shape features differ between the two varieties.