t-tests are parametric tests, which assume that the underlying distribution of the variable of interest is normally distributed.
Figure 7 plots the number of municipalities against their respective diversity values, for 1997 and 2011 respectively to lend a visual sense to the distribution of the variable, Diversity.
The IR values of hMabs were well correlated with the equilibrium association constant Ke, and also with the surface positive charge distribution of the variable region of the heavy chain (corrected surface net positive charge (cN) of the VH region).
will denote a complex Gaussian distribution of the variable, with mean and covariance matrix.
From this we can compute the probability density function of R̅, given an Exponential distribution of the variable T. Details of this calculation are provided in Appendix C.
This feature offers a measure of the estimation accuracy and reliability of the spatial distribution of the variable (Theodossiou and Latinopoulos 2006).
N ( x ; m, P ) denotes a Gaussian distribution of the variable x, with mean m and covariance matrix P. sinc denote the sinus cardinal function.
If there is perfect equality in the distribution of the variable, the percent of the population and the percent of the value are identical and the Lorenz curve is a 45° line.
In case of a non Gaussian distribution of the variable the results were confirmed with a non parametric test (Wilcoxon signed rank test) using GraphPad-Prism 5.
We analysed differences in main outcomes by CD4 category using parametric or non-parametric tests, depending on the distribution of the variable.
Given the possibility for change in the methods used to assess mother's physical grade during the period of data collection, we have undertaken stratified analyses (births 1950 1952 versus births 1953 1956) to determine whether the distribution of the variable and its effects on offspring cardiovascular disease outcomes varied between these two time periods.
