Changelog new confidence intervals for GraphQL Analytics API

Author: artikumar-cf

src/content/changelog/analytics/2025-10-01-confidence-intervals.mdx

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+---
+title: New Confidence Intervals in GraphQL Analytics API
+description: Confidence intervals are now supported in the GraphQL Analytics API to show statistical ranges for sampled data results
+date: 2025-10-01
+---
+ 
+The GraphQL Analytics API now supports confidence intervals for `sum` and `count` fields on adaptive (sampled) datasets. Confidence intervals provide a statistical range around sampled results, helping verify accuracy and quantify uncertainty. 
+
+- **Supported Datasets**: Adaptive (sampled) datasets only
+- **Supported Fields**: All `sum` and `count` fields
+- **Usage**: The confidence `level` must be provided as a decimal between 0 and 1 (e.g. `0.90`, `0.95`, `0.99`) 
+- **Default**: If no confidence level is specified, no intervals are returned
+
+For examples and more details, see the [GraphQL Analytics API documentation](https://developers.cloudflare.com/analytics/graphql-api/features/confidence-intervals/).