A-Level Biology - Spearman's rank correlation coefficient

[D Biology Classroom] CAIE A-level biology 9700

What is Spearman's rank correlation coefficient? How to use it for problem-solving?
*** I made a mistake in the numbers: d2 is not 448 but 452. So rs becomes -0.5734. The conclusion remains unchanged. Sorry for the mistake!

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[ryanmashavave]

My teacher has been teaching this topic for so long(the past 2 weeks) you explained it more clearly in 4 min.Thank you !

[harriskhan]

This is heavennn . seriously you've explained in a way that can not be more good

[goldielocks]

Your videos helped me with the practicals in AS, and now they're helping me with the P5 in AL. Thank you so much 🙏😭

[Itslibby]

Thank you much for amazing videos! They are very concise and well-explained :)

[jodiehawkes]

I just have to say that I’ve got my p5 mock today and if I hadn’t have found your channel a few days ago I would be DYING right now - so thank you

[winxclubflora]

Thank you are an bio Thanks for uploading thisss such great explanation and simplified tough concept

[grzle]

Thanks! Some other videos denote ranks from highest to lowest but my textbook and your video both denote rank from lowest to highest. I tried both ways and get the same answer so I guess the way you denote rank doesn't matter.

[HUVideoer]

thanks, this also works great for AS/A level marine science

[niranjan]

CAN U PLS MAKE A VIDEO FOR SAMPLING AS WELL???? PLSSSDDS

[dfgf]

One question please... Why did you not subtract 1 from n (in the significance table, n=12-1), as in other tests like chi-test and t-test.

[aselweerasekara]

Can you please confirm if the sum of D² is 448? I followed your question step wise I keep getting 452, ( disclaimer: not very good with the calculator)
Even in the phone I type in
30.25+56.25+9+72.25+30.25
+1+9+36+100+100+8 and it shows 452

However it is,
Thank you very much, only now I understand this

[foodreels]

Hey David! I have this query that what if there are only 2 tied scores. How will I be able to rank them. For eg. If both have value of 2 and their ranks are lets say 3 and 4. Then their rank will be average i.e 3.5??

[temioluwabunmi]

This is great. Thanks. How do you know the level of significance?, is it something that’s given? And also do I need to know these formulas off head, board Aqa

[ananyagc]

In one of the papers, they used the the n value in the level of significance table as - half of n ( as it was paired are we supposed to take n or half of n?

[faithzoey]

Does this mean that degrees of freedom for this statistical test is just the number of paired data or I'm missing something??😢

[yasiyousif]

Someone, please HELP!! I don't understand how you rank the data.

[rimshaasif]

Do we have to learn the formulas for alevels p4 exam?

[mikailkhan]

do we have to learn the formula or it will be given in the paper ? Board CIE

[Tryingveryhardpls]

Is the df 10 here? Why are we using 12

[zachhyams]

When I did the first example my rs value was not 0.445 but i got 0.566. Can anyone help me out?