How to calculate deviation, variance and standard deviation

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Dispersion and variation Dispersion and variation are words that are used to describe the spread of values in a given set of data. Before you proceed, I recommend you check this post out, it's a prerequisite. Consider the set of examination marks of ten students in the  image below The marks are the same. They do not vary. No dispersion. Check the image below You can see that the marks are not the same. They vary. Their mean is 60. Some of the marks are greater than 60 while others are less. This set of marks has a greater variation or dispersion than those in table 1 Also, consider this table which shows a third set of marks of ten students. Although the mean is also 60. Don't know how to calculate mean? click here . However, it is clear that the marks are more varied than those in table 2. Thus, the marks here have a greater dispersion than the other marks. Let's talk about range. Range The range of a set of numbers is the difference between the
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Do You Know: History And Father Of Mathematics

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HISTORY AND FATHER OF MATHEMATICS


Okay! We all have heard of math before. For those who don't know what math is, it's the short form of Mathematics. Don't be pissed, I'm just taking all precautions. But, have you ever wondered how or where or who even invented the energy sucking thing called math? If you haven't, stick with me till the end. It will surprise you!

Dating back to the Ancient Greek, far back to 287BC, Archimedes was born. He's know as the father of mathematics. He lived between 287BC - 212BC {Even before Christ came}.
Syracuse, which is the Greek island of Sicily is where this ancient being was born. I don't know how they kept the record till date with no internet, honestly. Maybe their birth date was stored on a rock called "Birth Rock Certificate Placement". Who knows?! Back to our history class.


Archimedes was serving the King Hiero II of Syracuse by solving math problems and creating interesting innovations for the King and His mighty army. The notable inventions are as follows;

• Measurement of a circle
• Method of exhaustion ----I haven't heard of this
• Relationship between spheres and cylinders
• Uses of prime numbers
• Archimedes principle and many more.
Now let's talk about another notable mathematician, Sir Pythagoras. You have to respect that name. Ofcourse, everyone knows his theorem but nobody gave a sh*t about his history! Seriously!! Ladies and Gentlemen!!! Terrible!!!!
Besides that, why are all of them from Greece! Where are Africans! Well, Pythagoras was born in Samos in the year 569BC and died 475BC. Do that math. He was the first mathematician. He is an extremely important figure in the foundation of mathematics, yet, barely known.

Unlike many Greek mathematicians who wrote numbers of books, pythagoras didn't write any. However, there is evidence he founded a school in southern Italy known as Semi circle of pythagoras (now known as Crotone). It was half religious and half scientific, which followed a code of secrecy. Hmm, Fishy!!


However, the school was more than a school that studied intellectual disciplines, but also studied philosophy, mathematics and astronomy.
Surprisingly, Pythagoras was a vegetarian who consumed dried and condensed food and unleavened bread. Pythagoras was famously known for pythagoras theorem.
He was also know for;

• Five climatic zones
• Five regular solids
• Proportions
• Pythagoras tuning
• Sphericity of earth and others

Hmm, before i bore you with history class which I'm not a fan of. That's all for today.

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Hi there, I'm a student like you who studied mechanical engineering and also aiming for software engineering. I'm here to walk you through basic and elementary mathematics. I'll give you the knowledge and foundation you need in a simplified way to build on and become a math geek you've always wanted to be. Like, share and follow for more videos

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