Source: Rao (1973), "Linear Statistical Inference and its applications", (2nd Edition), Wiley. Pris: J Bickel, A. Doksum (1977), "Mathematical Statistics", Holden Day. Dimension: 9*12 observations Description: force de tension moins 340 des fils contenus dans 9 cables (lignes 1 a 9) fabriques pour un reseau a haute tension. Chaque cable est constitue de 12 fils (colonnes 1 a 12).