Dataset: skull_measure.csv Source: T. Hanihara, Y. Dodo, O. Kondo, T. Nara, N. Doi, N. Sensui (1999). "Intra- and Inter-Observer Errors in Facial Flatness Measurements," Anthropological Science, Vol. 107, #1, pp. 25-39. Description: Measurements made on 10 skulls by 6 observers at two times (times are replicates, not a factor). Variable Names: observer skull time chord (frontal chord measurement)