科研之友
微信
新浪微博
Facebook
分享链接
摘要
Rules, formulas and statistical tests have been widely used in studies that use continuous variables in the normal or Gaussian distribution or other tests whose data fit this type of distribution (t and z distributions) and whose parameters can be defined. However, there are cases in which the model and goal of the scientific work allow only the use of discrete or nominal variables. The absence or presence of a structure or organ (muscles, nerves, blood vessels, bones, and ligaments), characteristics associated with these organs, such as the source of nerves, vessels and muscles and the distribution of nerves and vessels are discrete and / or nominal variables that do not fit the Gaussian distribution, nor of z or t, unless the measures of these structures are taken. A simple comparative method within the non-parametric distribution has been proposed, (1) between two different samples from the same species and (2) for two different species, based on the concepts of normal and variation in anatomy and on modal class in statistics here called Comparative Anatomy Index (IAC). The main findings on the use of this method are: (1) to allow the relationship between data from discrete or nominal variables in comparative anatomy or in other areas of morphology, (2) to generate an objective method (numerical) of comparison between samples of structures from the same species and between different species and (3) to fill the lack of a specific method for the statistical work in comparative anatomy or in morphology, in general. Normas, f車rmulas y pruebas estad赤sticas han sido ampliamente utilizadas en estudios que utilizan las variables continuas en el desarrollo de la distribuci車n normal o de Gauss, u otras pruebas, cuyos datos se ajustan a esta tipo de distribuci車n (t y z distribuciones), y cuyos par芍metros pueden ser definidos. Sin embargo, hay casos en que el modelo y el objetivo de los trabajos cient赤ficos s車lo permiten la uso de variables nominales o discretas. La ausencia o presencia de un estructura u 車rgano (m迆sculos, nervios, vasos sangu赤neos, huesos y ligamentos), las caracter赤sticas asociadas a estos 車rganos, como la fuente de los nervios, los m迆sculos y los buques y la distribuci車n de los nervios y los buques son discretos y / o variables nominales que no encajan en el curva de Gauss, ni de z o t, a menos que las medidas de estos estructuras se toman. Un simple m谷todo comparativo dentro de la no-param谷trico de la distribuci車n se ha propuesto, (1) entre dos muestras de la misma especie y (2) de dos especies diferentes, con base en los conceptos de normal
