## Class: `CronbachAlpha` cronbach, s, alpha, class, cronbachalpha, public, fields, js, new, data, record, string # Cronbach’s Alpha ## Class: `CronbachAlpha` **Constructor** ```js new CronbachAlpha(data: Record) ``` - Requires **≥ 2** parallel scales/items of equal length. ### Public fields - `alpha: number` – reliability estimate. - `sumOfVariances: number` – sum of item variances (sample). - `sumColumnVariance: number` – variance of summed score across rows. - `bessel: number` – correction factor `k/(k-1)`. - `ifItemsDeleted: Record` – getter recomputed lazily. - `htmlTable: string` – formatted summary table (getter).