normal distribution: IQs, Part 1

[layotota]

Nevermind, i got it....

[rezaeijavan]

SO HELPFULL :) thank you very much

[kingfker]

Its crazy how shit books is, this things is so easy when this man explaining.. Cool man ever, chears from Norway univer in stavanger

[person71591]

thank you so much for making this video

you truly saved me!

[IglooGirl1]

awesome! thank you SOOO much

[alnid1]

You are an amazing teacher...

[Nanumir]

how is it known that IQ scores are normally distributed? I'm fairly smart and it doesn't make complete sense to me... was there like a major study done or something?

[jsnider3675]

I'm back from vacation.

We know that IQ scores are normally distributed because when we take a fairly large set of random IQ values and plot them on a coordinate system, we always get a distribution in the well-known "bell-shape".

John Snider

[Nanumir]

so it always appears to have a "bell-shape", that makes sense.

thanks

[heyitspeter]

@John Snider. That's actually a common misconception, recently disproved. Apparently IQ scores don't even follow the stastically analyzable non-normal curves that we're aware of. Interesting stuff, and also kind of bewildering. Check out the paper below:

Micceri, Theodore. "The Unicorn, The Normal Curve, and Other Improbable Creatures." Psychological Bulletin 1989, Vol. 105. No.1, 156-166

[heyitspeter]

I should specify that it's a common misconception among statisticians and psychologists and not simply we humble few.

[laciencia73]

Do not get me wrong Nanumir, but don't consider yourself smart until you pass an STA class

[torrinihead]

very easy to understand. you saved me ten minutes before my exam!!!!!!!!!!!!!!

[pkerNwotz]

I love you! Thanks a bunch, have my maths exam next week, you sure saved me!

[tallica111]

thanks alot keep posting

[maypill70]

great video!!!!