Degrees of Freedom

[LincolnOnTheWeb]

Thank you, now I understand what degrees of freedom is, good video.

[nozy03]

Really good video. Thumbs up.

[KakashiLover2111]

OK, I get it now THANK YOU SOOOOOOOO Much :)

[lilymisa]

thank you so much :)

[BadAss708]

Very nice explanation

thanks a lot :D

[edmundbenz]

wow. now i understand. So every group you have to subtract 1. If two groups could -2. I hope I'm not wrong.

[jdeisenberg]

@edmundbenz Again, it depends on the test you are doing. In the case of chi-squared, you use a different formula than you would use for a t-test in determining degrees of freedom. Rather than just saying "always subtract one," you have to ask: "how many numbers can I choose freely before the rest are forced choices?"

[edmundbenz]

@jdeisenberg Alright thanks sir. I will take note of that.

[jdeisenberg]

@hexcane For chi-squared, you need the sums of each row and each column. The sum of each row has (c-1) degrees of freedom; once you've added (c-1) entries in a row, you can fill in the last one. The sum of each column has (r-1) degrees of freedom by similar logic.

[InformationStats]

Excelente explicación! Muchas gracias!

[jdeisenberg]

@InformationStats De nada.

[jdeisenberg]

@hexcane If you look at a chi-squared table, you have the total for the rows and columns. For each row, you can freely choose (columns-1) items before the last item is forced; same for the columns. So, if you have the totals for a 3 x 3 table, you will find that once you have any 4 entries in the table, you can figure out the rest by subtraction (that is, you have no freedom for the other 5 entries). Hope this helps a bit.

[baker70romeo]

you kickass man! i just hit a major brain fart 30 mins before my final, and you totally saved me.

[MultiLex101]

You have a remarkable ability to teach, thank you.

[nahsirah]

awesome! you know how difficult it is to get a simple explanation of this, brilliantly done.

[TheRulaBaby]

thank you, that explaination is 10x better than any text book!!

[jimmorgan76]

Brilliant in it's simplicity.  Thanks for posting this.

[Lisnageeragh]

@jimmorgan76 Absolutely ...This term is thrown around like ''snuff at a wake'' in stats lectures and Rarely gets a proper explanation ....the case used to be the same with' moments'....has it changed? ....I was a stats student in the 60s!

[BladesOfMunch]

Wow, if only others explained it so clearly! Now it's just a matter of figuring out how to clearly word all of that.

[ilovecrap]

danke

[Rupambindra]

Thanks!!

It was very simple & helpful.

[jdeisenberg]

@Rupambindra Thanks to you and all the others who commented. Glad you liked the video.

[PinkZeppelin65]

Perfect! explained simply in a very comprehendable way

[MohamedZero]

Thank you for the helpful video.

[bellarn0705]

Thank you, you helped me understand!

[apostledre]

Thanks. You are really good at making it plain.

[AbyssZomG]

Very helpful and easy to understand, thanks!

[xygius1]

Excellent, many thanks for this info, it was most helpful.

[caviper1]

Thanks. Can you link the concept of degrees of freedom with a significance test?