feat: initial commit

src/fit_quality.rs

@@ -0,0 +1,22 @@
+/// Represents the quality of fit for an estimation distribution.
+#[derive(Debug, Clone, PartialEq)]
+pub struct EstimationFitQuality {
+    /// Mean Absolute Percentage Error (MAPE)
+    pub mean_absolute_percentage_error: f64,
+    /// Root Mean Square Error (RMSE)
+    pub root_mean_square_error: f64,
+    /// Mean of the fitted distribution
+    pub distribution_mean: f64,
+    /// Median of the fitted distribution
+    pub distribution_median: f64,
+    /// Mode of the fitted distribution
+    pub distribution_mode: f64,
+    /// Proportion of data within 50% confidence interval (interquartile range)
+    pub within_50_percent: f64,
+    /// Proportion of data within 68% confidence interval (approx. 1 std dev)
+    pub within_68_percent: f64,
+    /// Proportion of data within 95% confidence interval (approx. 2 std dev)
+    pub within_95_percent: f64,
+    /// The number of data points used in the calculation
+    pub sample_size: usize,
+}