Dependent and independent samples

What is actually the difference between a dependent sample and an independent sample (paired or unpaired samples)? And why is it important to know the difference? Whether the data are from a dependent or independent sample determines which hypothesis test is used.

If your data are independent, for example, a t-test for independent samples is calculated or an analysis of variance without repeated measures. If your data are dependent, for example, a t-test for dependent samples or an ANOVA with measurement repetitions is calculated.

The online statistics calculator:

The tutorial about dependent and independent samples

[Nothingimportant]

I did not know Austria also has such brilliant people. Thanks for the wonderful and concise explanation.

[dmana]

Being a dependent is always better in a real world. Dependency all the way! It makes my life alot easier! :)

[Max]

Appreciate the clear explanation, very well done.

[disstrust]

Thank you. Very nicely explained. In the 3:51 minute, when you talk about dependent samples and the machines lubricated, is it the same machine being lubricated first with great A and than with grease B, or are there two machines of the same type?

[AngelEsparza-qrvm]

mucha gracias por estos videos, ayudan muchísimo a mi formación.

[ShoKeti]

Thank you! But I still have a question. Сould you help me please? there is one sample of biomaterial and two reagents on which this sample was analyzed. I need to evaluate the results obtained after the analysis. Will the data be dependent?

[fernandopaez]

Excellent. I have a question please. If I have multiple measurements of a single variable of two different times taken at the same points with coordinates. This would be considered a related or dependent sample, right?

[cococnk]

Let us say I have thesame number of individuals that carry on a math test and english test

here the samples are dependent?

Thanks for the video

[halamokhtar]

Independant varible define is that can manipulate l dont understand what the relation how to be grounded based upon the control and case group

[mahakgarg]

I want to to use datatab for my data but my data more than 30 rows in datatab tutorial there are only 23 rows how can I calculate statistics of my data please help

[TR-rxej]

Could you please tell me parametric test that can be used for trend analysis. I want to use it to identify trend in hydrochemical data that include concentrations of Ca, Mg, Na, etc.

[JuliaCordero]

Not only are you smart, but you're also extremely beautiful. (I just said it, we were all thinking it ;D)