On October 20, World Statistics Day is celebrated all over the planet, a day promoted by the UN with which it is intended to raise awareness in society about the importance of the timely production of reliable statistics and indicators that measure the progress made by the countries. The appointment, born in 2010, is commemorated every five years. That is why this is its third edition, which has the motto ‘Connecting the world with reliable data’.

It should be noted that statistics is the branch of mathematics that studies variability, as well as the random process that generates it following the laws of probability. Taking advantage of the occasion of this day, various experts remember these days the benefits that your practice provides for the little ones, such as how enormously useful it is for them to understand the environment that surrounds them or the fact that it allows to quantify reality and have the necessary elements to analyze it, which notably stimulates their memory and concentration.

In order to introduce children to this field, below these lines you can find some guidelines for them to practice statistics in an entertaining way.

  • Arithmetic average: a very simple exercise to get started in this field is to calculate the arithmetic mean. This is the value obtained by adding all the data available and dividing the result by the total number of the aforementioned figures. Thus, in an assumption in which the heights of four children are 150, 150, 160 and 160 centimeters, the arithmetic mean will be 155 centimeters, so that all the heights differ by five centimeters from that measurement.
  • Everyday items: One of the great advantages of this science is that it can be applied to the common problems that occur in the daily lives of children. In this way, it can be explained with something as simple as a bag of different colored goodies. You have to start by classifying them by color. Later, you can test with the estimates: which is the color of which there seems to be more, which of which less … Then they must be counted to check those predictions. Finally, when you have the exact number of candies of each color, they are ordered from highest to lowest. To do this, it is advisable to use rules in order to represent each of the numbers and thus be able to order them according to the length of the row.
  • ‘Not everything is black or white’: It is important that they understand that one of the hallmarks of statistics, unlike other branches of mathematics, is that things are rarely black and white, so data must be interpreted from the perspective of the real world, and many times the answer is not clear. But there it lies precisely its main strength, which is that ability to identify the ingredient of uncertainty, address it and quantify it.

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