{"version":"1.0","type":"rich","title":"grades vs sleep","description":"This grouped bar chart visualizes how students' grades (A, B, C, D, E) correlate with their self-reported sleep patterns (e.g., Good, Fair, Poor). The chart uses a D3.js v7 SVG renderer with `d3.scaleBand` for the categorical axes and `d3.scaleOrdinal` with `d3.schemeSet2` for color. It reads a CSV from a Gist, aggregates counts with `d3.rollups`, and displays a tooltip on hover.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7db074b19d5f4f44845b80e635b78425?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}