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During the time of the Covid 19 pandemic, the behavior of three human groups was analyzed after having completed the 16-week academic semester in September 2020. The students of each human were divided into 4 resulting quadrants, the attitudinal behavior was weighted on the axis of the abscissa and the axis of the ordinates to the final grade. The students of each one of the groups were distributed applying their percentage value within each one of the quadrants, those that are denominated talented, responsible, confident, disinterested, being their averages 18.27%, 37.69%, 13.09% and 30.99% respectively. It was demonstrated that there is no significant difference between the three groups, in terms of the percentage values assigned to each of the quadrants, as well as that there is no significant difference between the percentage values between the quadrants of the talented and the confident, nor between the responsible and the disinterested.

The mango was pulped and then the pulp was refined into a puree, being evaluated the independent variables called “Sieve mesh size” evaluating 5 mesh sizes and “Exposure time to atmospheric air” evaluating every 15 min up to 135 min, considering as a dependent variable “Color of mango puree” evaluating the Hunter Lab coordinates. The objective was to determine if there is a significant difference in the influence of the independent variables versus the dependent variable. It was obtained that the refined puree, the smaller the size of the holes in the mesh, as well as when the exposure time to the environmental air increases, the lower the luminosity values and the b-coordinate (yellowish) will be. By means of a two-factor factorial design, is concluded at a 5% significance level, that a significant difference exists, then the alternative hypothesis is accepted and the null hypothesis is rejected.

In order to determine the values of the dependent variable called “Color of the mango puree”, first the peel and the seed must be extracted by pulping and secondly refined again on a fine mesh sieve to obtain the puree. Five mesh sizes were evaluated from the first independent variable called “Sieve size” and corresponding to the second independent variable “Interaction time” ten different times were evaluated every 15 minutes from zero minute to 135 minutes. As for the dependent variable, the Hunter Lab coordinates were evaluated, using a Minolta CR-400 colorimeter, with three levels of the variable, which are the brightness, the a-coordinate a (a+: yellow/a-: blue), and the b-coordinate (b+: red/b-: green). As far as the results of the colour coordinates are concerned, during refined pulping for the same time, predominantly the smaller the hole size (larger mesh size) the lower the values for luminosity and the b-coordinate (b+) will be obtained: yellow colour; whereas as the interaction time increases from 0 minutes (freshly refined) to 135 minutes (final interaction time), predominantly lower values will be obtained for both brightness and b-coordinate, and there is no marked difference to the a-coordinate values (a+: red colour).