Iris_Classification

By shrijeetverma13 · April 24, 2026

The Iris Classification dataset is a well-known dataset in machine learning, commonly used for classification tasks. It contains measurements of various…

Iris-setosa is the most compact species overall, with the smallest average of 2.53 across all four measurements (sepal length, sepal width, petal length, and petal width). A grouped bar chart has been generated showing how each species compares across all four measurements, making it easy to see the size differences visually.

The bar chart and data table clearly show how average petal width varies across the three iris species. Virginica stands out with the widest petals, followed by versicolor, while setosa has the narrowest petals by a significant margin.

The bar chart displays the average sepal length-to-width ratio for each iris species, clearly showing which species has the most elongated sepals. Based on the visualization, you can compare the ratios across Setosa, Versicolor, and Virginica to identify the species with the highest ratio (most elongated sepals).

Yes! Iris-setosa stands out with unusually wide sepals relative to their length. Its average sepal width-to-length ratio is 0.68, which is significantly higher than Iris-versicolor (0.47) and Iris-virginica (0.45). Two visualizations were generated: a scatter plot showing sepal width vs. length by species, and a box plot comparing the width-to-length ratio distributions across all three species.

The petal length-to-width ratio varies dramatically across the three iris species, and it's a powerful way to tell them apart. Two box plots and a scatter chart were generated to visualize these differences. Iris-setosa has by far the highest ratio (mean of 7.08), meaning its petals are very narrow relative to their length. Iris-versicolor sits in the middle (mean 3.24), while Iris-virginica has the lowest ratio (mean 2.78), indicating proportionally wider petals. Setosa also shows much higher variability (std of 3.12 vs ~0.3–0.4 for the others), reflecting its extremely tiny petal widths (0.1–0.2 cm).

Based on the visualizations generated, Iris versicolor and Iris virginica are the two species with the most overlapping measurements, making them the hardest to distinguish. The scatter plot of petal length vs. petal width clearly shows how these two species overlap in the middle region, while Iris setosa is easily separated from both. The bar chart of separation scores confirms this finding — the versicolor vs. virginica pair has the lowest separation score, indicating the greatest overlap across all four measurements.

Yes, petal length is strongly correlated with sepal length overall, with a Pearson correlation of r = 0.872. Two visualizations were generated: a scatter plot showing the relationship colored by species with trend lines, and a bar chart comparing the correlation strength across each species. These charts reveal how the overall strong correlation breaks down at the species level.

Petal measurements — both petal length and petal width — are the best features for distinguishing between the three iris species. The visualizations generated show clear, well-separated clusters when plotting petal dimensions by species, with minimal overlap between groups. Sepal measurements, by comparison, show much more overlap and are less effective at telling the species apart.

Iris-virginica has the largest average petal length at 5.55 cm. It significantly outpaces the other two species — exceeding Iris-versicolor by 1.29 cm and Iris-setosa by an impressive 4.09 cm. A bar chart has been generated to visually compare the average petal lengths across all three species.

Iris-virginica shows the greatest variability in petal length among the three iris species. With a standard deviation of 0.55 cm and a coefficient of variation of 9.9%, its petal lengths range widely from 4.5 to 6.9 cm — suggesting the presence of diverse sub-populations within this species. A box plot with all individual data points has been generated to visually compare the spread across species.

The bar chart clearly shows the two extreme specimens. The largest petal length belongs to specimen at row 118 — an Iris-virginica with a petal length of 6.9 cm (petal width: 2.3 cm, sepal: 7.7×2.6 cm). The smallest petal length belongs to specimen at row 22 — an Iris-setosa with a petal length of just 1.0 cm (petal width: 0.2 cm, sepal: 4.6×3.6 cm).

A bar chart has been generated showing the median sepal width for each iris species compared to the overall median. The visualization clearly displays how each species compares against the dataset-wide median sepal width, with a dashed red reference line marking the overall median.

The dataset contains exactly 50 samples for each of the three species — Iris-setosa, Iris-versicolor, and Iris-virginica — totaling 150 samples. This is a perfectly balanced dataset, meaning each species has equal representation, making it highly reliable for comparisons and analysis.

Iris-setosa shows the most consistent sepal length growth, with the narrowest range of just 1.5 cm (spanning from 4.3 cm to 5.8 cm). A box plot and data table have been generated to visually compare the distributions across all three species.

The 25th and 75th percentile values for petal length vary significantly across the three Iris species. A box plot and data table have been generated to visualize these distributions. Here's a summary: Iris-setosa has the smallest petals (25th: 1.4 cm, 75th: 1.575 cm), Iris-versicolor falls in the middle (25th: 4.0 cm, 75th: 4.6 cm), and Iris-virginica has the largest petals (25th: 5.1 cm, 75th: 5.875 cm).

All three Iris species have been ranked by their combined average flower measurements (sepal length, sepal width, petal length, and petal width). A bar chart and data table show the full breakdown. Here's the ranking: 1 Iris-virginica (17.14), 2 Iris-versicolor (14.29), and 3 Iris-setosa (10.13).

A petal width threshold of 0.80 cm perfectly separates Iris-setosa (the smallest species) from Iris-versicolor and Iris-virginica, achieving 100% classification accuracy . Any flower with a petal width ≤ 0.80 cm is Iris-setosa, while anything above belongs to one of the other two species. The histogram visualization clearly shows this clean separation in the data.