I know this sounds really really crazy but the guy who made this t test (William sealy gosset) is actually my great great grandfather!! he worked at a bar for Guinness and wasn't allowed to publish his work with his real name, so he published under "student".
Hi Sonja! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Hi Aadil! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Hi Bangtan! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Hi Plo! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Hello, very nice video. Could you tell me where you found that table (df/P). My df is 18 and your table is only showing the part from 21 to 24. Thanks in advance!
Hey, thank you ! I got the table from a past year question, but I think you can search it online. Even though most of the time there will be slight variations in the value but it usually doesn't affect the outcome much.
Hi Tan! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Sir considering you stated clearly you won’t focus on the math part of the test, is there any way the examiner could ask us on the mathematical importance/logics/working in an A Level biology exam?
Hi, according to the syllabus, what you need to know are: when to use t test, how to calculate (formula will be given), and how to make conclusion based on the test. They might as how u get the degree of freedom and why u choose the significance level at p=0.05, but I haven't seen any questions beyond that.
sir should we memorize all the formulas or will it be given, I will be learning what each symbol stands for, but should I learn the exact equations of all the mathematical formulas?
Hi Asma! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Hi that is the probability when we want to make a conclusion with 95% of confidence level. Well my maths is not that great LOL but it is something like this: I want 95% confidence level, so I only allow 5% of error. 5% is 0.05 so that is the critical probability we look at.
Biological variables which can be expressed in numerical values usually fit the normal distribution due to natural selection and evolution. ie. the environment has selected the most suitable characteristics to survive, so they are the "normal" or the average, their number is the highest. Extreme cases on both ends are selected against so their number is the lowest.
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I know this sounds really really crazy but the guy who made this t test (William sealy gosset) is actually my great great grandfather!! he worked at a bar for Guinness and wasn't allowed to publish his work with his real name, so he published under "student".
that is pretty cool :)
Wow, amazing.🤩
And it's coming in my tomorrow s exam
I wish he was credited
I have some personal beef with your great great grandfather ( jk. man shoulda been credited :) )
Tats soo impressiveee❤❤
This was perfect! I missed some statistical tests lessons and was having the hardest time understanding the topic by myself. Thanks so much !!
You are welcome !
Hi Sonja! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Thank you!! I didn't realise how easy this was. You explained it wonderfully
you are welcome :)
You are an amazing teacher,like u do have the gift of explaining complex things very easily and also without wasting anyones time.
Thank you for the kind words !
Hi Aadil! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Thank you for all your P5 videos! You are such a great Biology teacher!!!
You're very welcome!
Thank you so much, I didn't understand it before 😭
Glad that I can help !
crystal clear, i referred 20 classes before but no idea, now i get it, Thanks David
You are welcome! Glad that I can help :)
You are a life saviour ❤😭
you are welcome !
theres nothing quite like learning biology from youtube video
Hope this video helps :)
Thank you!!! My biology teacher is shit and i basically have to self study through A levels because of him. This video was so clear and precise
LOL ok... gald that I can help
omg you saved my life, i thought i'd never understand. thank you so much!!
You are welcome :)
Hi Bangtan! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
I have a A2 biology P5 exam tomorrow and this video has helped me a lot! Thank you sir!!
All the best !!!
Great video, easy to understand and clearly laid out. Really helped me with my revision.Thanks!
Glad that I can help :)
Hi Plo! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Simple and straight to the point. Thank you!
You are welcome !
I had no idea what P5 was about! Your videos really helped. Thank you !!!
You are welcome !
i actually enjoyed learning about this thank you so much :)
You are welcome :))))
Thank you for explaining T-test in such simple way!!!
You are welcome !
perfect and clear
Thank u !
thank you so much for this i was getting quite confused about this. Cheers!
You are welcome 😁 I am glad that I can help
Amazing explanation thank you so much
You are welcome !
Very well explained, thank you
You are welcome !
So amazing!
Thank you !
this really helped. thank you :)
You are welcome!
Just when i needed it 😭 thankyou so much😭👍
You are welcome!!
Hello, very nice video. Could you tell me where you found that table (df/P). My df is 18 and your table is only showing the part from 21 to 24. Thanks in advance!
Hey, thank you !
I got the table from a past year question, but I think you can search it online. Even though most of the time there will be slight variations in the value but it usually doesn't affect the outcome much.
Mate your a legend
Thank you so much 🙏🏻
Can you please do videos for other tests like x^2 , Pearson's and Spearmans's?
I just uploaded a video for the chi-squared test. The others are on their way too :)
Hi Tan! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
Great video, thank you
you are welcome :)
thank you so so much!!
You are welcome !
may lord bless you
Thank you !
How did you calculate the standard deviation
Hi I have a video for it: ruclips.net/video/0YT2Idf4-sA/видео.html
Sir considering you stated clearly you won’t focus on the math part of the test, is there any way the examiner could ask us on the mathematical importance/logics/working in an A Level biology exam?
Hi, according to the syllabus, what you need to know are: when to use t test, how to calculate (formula will be given), and how to make conclusion based on the test. They might as how u get the degree of freedom and why u choose the significance level at p=0.05, but I haven't seen any questions beyond that.
Got it ;)
Can you make a video on 'examples' involving restoration of degraded habitats and controlling alien species? Thank you :)
Hi thanks for the suggestion, I can't promise because there are quite many videos I am making at the moment, but I will try when it is possible :)
sir should we memorize all the formulas or will it be given, I will be learning what each symbol stands for, but should I learn the exact equations of all the mathematical formulas?
All formulas will be given in the exam
Thanku very much❤️
you are welcome !
Hi Asma! I have a RUclips channel dedicated to explaining A Level Biology topics that you may find useful! I have recently uploaded a video on the Chi-squared test. Hope this helps :D
what does p0.05 mean?
Hi that is the probability when we want to make a conclusion with 95% of confidence level. Well my maths is not that great LOL but it is something like this: I want 95% confidence level, so I only allow 5% of error. 5% is 0.05 so that is the critical probability we look at.
can you please make a full unit 5 bio video
Interesting
thanksss man
You are welcome :)
do we have to remember df equation
No, the equation will be given
@@DBiologyClassroom degree of freedom equation would be given??
@@MarkSimon-g2z for degree of freedom, equation may not be given
thank you, you saved my fucking life
Hahaha... you are welcome !
How do you know the data is normally distributed?
Biological variables which can be expressed in numerical values usually fit the normal distribution due to natural selection and evolution. ie. the environment has selected the most suitable characteristics to survive, so they are the "normal" or the average, their number is the highest. Extreme cases on both ends are selected against so their number is the lowest.
Upload more please
Hi, I will definitely try to. Thanks you :)
i got -1.268, could you please explain what i did wrong
Hi, the top part is inside a modulus (that two straight lines on either side), so everything becomes positive.
i got -1.269 for my t value not 1.269
Hey, in the formula, there is a modulus sigh (where you have 183 -185), so the value is changed to positive