Maths in Biology - AS

[@baby103ful]

Serial Dilution 5:54

[@nana.akuaap]

Thank you so much. The first exam is tomorrow and I often get the maths questions wrong/mixed up. Honestly your videos are so helpful ❤️😭

[@BioRach]

Maths can be a bit confusing but I'm glad you find the videos helpful! All the best with tomorrow, rest well and enjoy the paper! :D Thanks for watching!

[@nbsgamer6917]

you are a god... thank you very much. This was the one bit of biology i didn't 't know how to revise but with this, that problem is "solved".

[@BioRach]

Maths isn't always easy in Biology, so I'm glad this video is helping you :) But remember this only covers the equations, what they actually do and what the symbols mean - you still need loads of practice to make sure you know how to use them! Thanks for watching :D

[@muadalmutareb6081]

Astagfurallah only Allah is god

[@milanacs1916]

@@muadalmutareb6081cap there are many gods and Odin is thier king, get your facts straight buddy

[@muadalmutareb6081]

Nah that guy died in that Thor film

[@OmniversalInsect]

@@muadalmutareb6081 Lies, the flying spaghetti monster is the true lord.

[@zaynaba6626]

thank you for taking the time and effort to doing this!

[@BioRach]

Glad you find it helpful! Thanks for watching :D

[@ooaa7379]

Where have you been all my life? This is so helpful

[@BioRach]

haha glad it helped! Thanks for watching :)

[@mollyellashowjumping3836]

In psychology when the test has an R in it the calculated value has to be greater or equal to the critical value to reject the null. The 't-test' has no R in it so the calculated value must be less than or equal to the critical values to reject! (and so there is a sig difference). Obviously this is not the case for biology as in the t-test above it states that there is no sig difference when the calculated value is less than the critical value. Anyway my question is....is that how it is calculated for every test? In that there will always be no sig difference if the calc value is less than critical value. Hope that makes sense, thanks for the video!

[@BioRach]

I'm not sure about Psychology - might the best idea to ask your teacher soon! But yes, if the value calculated is smaller than your critical value, then there will be no significant difference/correlation (depending on what test you're doing). Thanks for watching :D

[@bananaporridge7151]

i’ve got my bio paper tomorrow!! thank you so much for making this video xx

[@BioRach]

No worries! Hope it went well today :D Thanks for watching!

[@bananaporridge7151]

BioRach no thank u for proving us with these amazing resources!! x

[@DB-us6sb]

Just a suggestion, but could you do a video on 'how to plan the perfect investigations/experiments?' (so including variables, controls and etc). It seems to be a pattern for these questions to come up in the OCR A spec from the last two years. Great video by the way!

[@BioRach]

Good idea! I'll see if I have time to make that soon... It's now on my list :) Thanks for the suggestion and thanks for watching!

[@rachelduff5787]

Thank you - your videos are so helpful :) and what pen are you using here? 😁

[@BioRach]

haha the pens are mainly from the Pilot Juice series, they do lovely colours, though it's not as pretty on screen than in real life. Thanks for watching! :D

[@raph_n4]

done the video so effortlessly, if i get an A in my exams , all thanks to you

[@ramonaianc6551]

The first question is GCSE level so not too difficult. Can you show an example for a question using the scale bar to find actual size as this was not very clear?

[@i.a590]

for serial dilution i thought that the volume of distilled water added had to be constant??

[@sianna8196]

i think different volumes are added to overall make a constant set

[@AlevelStudent-c1y]

Is there a different formula for the degrees of freedom of a paired and unpaired t test ?

[@nishatz6607]

Video was really helpful , wish I watched this before my first paper😭

[@BioRach]

haha it's ok! You'll still meet these calculations in the future so never too late! Thanks for watching :)

[@mairasiemonkleba8056]

Thank you so much for making these they are very helpful!

[@BioRach]

No worries, glad you find them helpful! Thanks for watching! :D

[@Ki-bj3yz]

For Q10 calc why don't we do R2/R1 to the power of 10÷T2-T1 ? I know that in this example the answer is the same but would it be so for other calculations ? Thanks

[@BioRach]

There may be another way to calculate Q10, but this is the one you need to learn from AS Biology, as taught from the spec. I don't understand the method you've shown so I'm not sure about the other calculations will give you the same result... Sorry! But thanks for watching :)

[@Ki-bj3yz]

@@BioRach thanks its just the one my college taught us for OCR , but I have checked the spec and your one is the only one mentioned. Thanks for the great vids !

[@BioRach]

@@Ki-bj3yz No worries! It's good to clear it up as well, thanks for letting me know! :D

[@tesconstamylo]

Nicely done ✅☺️

[@nishatz6607]

I don’t understand , in the T-test ,the bottom of the equation , you said wrk out the SD and divide by n1, I don’t understand what the SD is or how u got it ?

[@BioRach]

Like I said in the video, you'll need to have done standard deviation (SD) first, as you use the SD value within your t-test equation to find the t-value. Having said that, in exams they will either: 1. Give you SD, then ask you to work out the t-value and do a conclusion OR 2. Ask you to work out SD, then give you the t-value and ask you to do a conclusion on the t-test Hope this helps!

[@ini6325]

Absolutely amazing thank you!

[@BioRach]

Glad it helped :) Thanks for watching!

[@حبةخردل-د2غ]

I did not understand how d is calculated in statistics. will you please elaborate on that. thanks a lot for the great video.

[@BioRach]

For the details on statistics calculations, please watch this video: kzbin.info/www/bejne/rHW1dYewi9lgmpY

[@alitajoo9233]

hey thanks! and is it 9700?

[@betul-ev2fu]

thankyou so much 😲

[@lovescience7330]

Wonderful

[@FR-tn4qj]

OMG thank you so much

[@BioRach]

haha no worries, hope it helps! Thanks for watching :D

[@knowledgejunction1643]

Nice love from india

[@betul-ev2fu]

9:01

[@umerkhan3036]

Is this for aqa

[@BioRach]

Not necessarily, but the maths should be the same.

[@umerkhan3036]

BioRach would the series of dilution be the same

[@BioRach]

Should be. The key difference between exam boards is the style of questions/mark scheme, the science and maths themselves should be exactly the same.

[@umerkhan3036]

BioRach okay thank you very much 😄😄😄

[@hussainjafri7893]

You forgot to talk through histograms :/ but otherwise the video was 10/10 🤓

[@BioRach]

haha yes my focus was more on maths (equations) that come up often in Biology rather than all maths!