I chose the topic '3D printers' because every information I find is in English...

[Borislav]

In the university my course work is to make paper for something which is related to the IT.I made HUGE mistake when I chose the topic "3D printers" because every information I find is in English.However I'm giving my best and browsering in the web.
I'll be glad if someone can tell my in plain English their meanings :
-Mean
-Std. Dev. (_)

[Mister Micawber]

Mean = The average value of a set of numbers.

Standard deviation = A measure of the dispersion of a set of data from its mean. The more spread apart the data is, the higher the deviation. The standard deviation is equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.
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Native English teacher at Mister Micawber's

[Borislav]

Mister Micawber thank you very much.It is good that I train my English but the bad is that not everything in English can be translated. This is what I mean under "huge mistake"