Attalea (plant) important economically. Products extracted from "A. speciosa" were reported to support over 300,000 households in the Brazilian state of Maranhão in 2005, and in 1985 it was estimated to support over 450,000 households throughout the Brazil. Piassava fibres, extracted from the leaf bases of "A. funifera", are commercially important, and generated about US$20 million in annual income to Brazilian farmers in 1996. Attalea (plant) Attalea is a large genus of palms native to Mexico, the Caribbean, and Central and South America. This pinnately leaved, nonspiny genus includes both small palms lacking an aboveground stem and large trees. The genus has
Average variance extracted Average variance extracted In statistics (classical test theory), average variance extracted (AVE) is a measure of the amount of variance that is captured by a construct in relation to the amount of variance due to measurement error. The average variance extracted was first proposed by Fornell & Larcker (1981). The average variance extracted can be calculated as follows: Here, formula_2 is the number of items, formula_3 the factor loading of item formula_4 and formula_5 the variance of the error of item formula_4. The average variance extracted has often been used to assess discriminant validity based on the following "rule of