Methods for increasing the accuracy of experiments; Notes on the statistical analysis of the results; Completely randomized, randomized block, and latin square designs; Factorial experiments; Confounding; Factorial experiments in fractional replication; Some methods for the study of response surfaces; Incomplete block designs; Lattice designs and squares.

The Gertrude Mary Cox Papers consist of correspondence, diaries, photographs, speeches, articles, diplomas, certificates and other materials relating to her career in statistics, her consulting work, travel, honors received, and the Cox Fellowship which was created in her honor. All of Dr. Cox's work demonstrates a desire to promote the practical application of modern statistical procedures. The programs she developed provided services to agriculture, industry, and government and helped make North Carolina a world center for advanced work in statistics and mathematics. Her writings relate statistics to various subjects including: education, agriculture, nutrition, experimental design, biometrics, horticulture, home economics, and international research.

Metodos para incrementar la exactitud de los experimentos; Notas sobre el analisis estadistico de los resultados; Disenos completamente al azar, bloques al azar y cuadro latino; Experimentos factoriales; Confusion; Experimentos factoriales en repeticion fraccionada; Experimentos factoriales con efectos principales confundidos: disenos de parcelas divididas; Experimentos factoriales confudidos en cuadros cuasi latinos; Algunos metodos para el estudio de las superficies de respuesta; Disenos en bloques incompletos; Disenos en latices; Disenos balanceados y parcialmente balanceados en bloques incompletos; Latices cuadrados; Cuadros latinos incompletos; Analisis de los resultados de una serie de experimentos.