Mates y TIC - Maths and ICT

Actividades de Matemáticas con TIC - Math Activities with ICT - - - ( Ricardo García Mesa

Two variables statistics theory

Posted by ricardogm on May 21st, 2019

Here you are.

And some guide to interpret the values of r:

(Extract from Malawi Medical Journal:


Another version here.

Posted in 4º ESO | No Comments »

Two dimensional statistics

Posted by ricardogm on May 20th, 2019


A site with the basics of this topic

Posted in 4º ESO | No Comments »

Statistic project

Posted by ricardogm on May 17th, 2019

1. First of all, we are going to organize the teams for the statistic project. Tell me the members of each team and a name for it.

2. Now a little information about the project. It will be a Word document, or Powerpoint,  with, at least, this structure:

1. Frontpage with your names and the title of the project.

2. Introduction (in another page). Explaining the goal of the project, what you want to know, how you got the data, etc.

3. Another page with the data, in table form.

4. Another page with graphics.

5. One more with all the calculations.

6. And one with the final conclusions.

3. Remember, we are going to study the relationship between two variables, posibly with a survey. You need al least 30 data points. Less than that, it’s anecdotal.

4. And we are going to learn to use geogebra in statistics, today with one variable, next friday with two. Pay attention

Ex.1 isolated data:

The number of occupants in passing cars are counted. The results are:

1 2 1 4 3 1 2 1 5 4
1 1 1 2 1 3 1 4 1 1
1 2 1 1 1 2 1 1 4 2
2 2 1 2 1 3 2 1 2 1

Ex. 2

A class of 40 students took a mock exam in maths. They were given percentage marks as follows:

73, 45, 62, 34, 59, 20, 48, 50, 78, 38, 52, 91, 57, 82, 46, 51, 62, 58, 39, 50, 72, 73, 63, 52, 41, 37, 28, 46, 71, 75, 36, 28, 44, 90, 51, 28, 60, 18, 47, 40.

As a bonus, this image links to some examples of terrible powerpoint design:

Posted in 4º ESO | No Comments »

Perpendicular común a rectas que se cruzan

Posted by ricardogm on May 1st, 2019


Muy buenas

Adjunto aquí un ejercicio de este tipo resuelto de tres maneras distintas.

Y un par de videos sobre el tema (usan el método que prefiero):

Posted in 2º Bach. CT | No Comments »

Statistics 1

Posted by ricardogm on April 8th, 2019


Time to start a new unit, statistics.

1.Read the following pdf and write in your notebook the basic vocabulary of this unit (the words are marked in blue). Use your book to find out the equivalences in spanish. In short, make a glossary.

Statistics unit 12.

2. Now solve in your notebook as many exercises of the unit as you can.

3. And some information about surveys:

How to do a survey.

4. A video is a must:

Posted in 4º ESO | No Comments »

Functions III

Posted by ricardogm on March 29th, 2019


Pay attention, you are going to learn to draw funcions like in the examples below. Send all to my mail.

Families of functions:

Piecewise functions

Absolute value

Posted in 4º ESO | No Comments »

Repaso examen de integrales

Posted by ricardogm on March 29th, 2019


Muy buenas

De cara al examen, un examen:


Y las soluciones del tema:

Tema 12

Posted in 2º Bach. CT | No Comments »

Piecewise functions

Posted by ricardogm on March 18th, 2019

A video about this thing:

Piecewise functions video

And the theory:
Piecewise functions

Here you can take a look at the most usual families of functions:

Posted in 4º ESO | No Comments »

Integral definida I

Posted by ricardogm on March 14th, 2019

Muy buenas:

Primera aproximación a la integral definida, mediante sumas inferiores y superiores (sumas de Riemann).

Algún problema que se puede producir:

Propiedades de la integral definida

1. El valor de la integral definida cambia de signo si se permutan los límites de integración.

propiedad de la integral definida

2. Si los límites que integración coinciden, la integral definida vale cero.


3. Si c es un punto interior del intervalo [a, b], la integral definida se descompone como una suma de dos integrales extendidas a los intervalos [a, c] y [c, b].


4. La integral definida de una suma de funciones es igual a la suma de integrales·


5. La integral del producto de una constante por una función es igual a la constante por la integral de la función.


Y un video:

Posted in 2º Bach. CT | No Comments »

Functions II, increasing, decreasing, etc.

Posted by ricardogm on March 13th, 2019


1. Increasing and decreasing functions:

a) The theory.

b) Geogebra applets:

2. Continuous or discontinuous functions:

a) The theory

b) An applet with piecewise functions to help visualize this concept.

3. Periodic functions:

a) The definition

b) And an applet:

And a video about rate of change:

Posted in 4º ESO | No Comments »