Student's t-test (Paired and Unpaired) - A Level Biology

The Student’s t-test is one of the statistical tests used in A Level Biology. It is used to determine the significance of the difference between two means. This video will teach you when and how to use two types of t-test, Paired and Unpaired, and includes examples of each.

It will take you through the whole process including:
- how to state your null hypothesis
- which Student’s t-test to use and why
- how to carry out the statistical tests
- finding the critical value at p=0.05 (and what that means)
- writing a conclusion for your findings.

Follow us in instagram - @mrshbiology.

[asmevenuv]

My AS exam is in 3 days and your “A Level Statistics/Maths in Biology” playlist just saved my life. Your way of teaching is super calm and effective. I can’t be thankful enough!

[AG-qlsy]

you have such an amazing way with your words and your teaching, everything just makes sense

[elizabethadedayo]

Great explanation Mrs, wish I found your channel sooner :)

[kskeduchannel]

good explanation in simpler way. tq mam

[thebioexplained]

bio paper 3 tomorrow - thanks so much for this - really clear and helpful!

[donyarashidi]

thank you for your time that was perfectly taught

[joumaalmohammed]

Thanks so much.. very easy to understand. 👨‍💻

[AG-qlsy]

amazing video, do we need to know how to do the calculations for the actual exam? I cant fully remember but i think i was told it was just to be used during the practicals

[mackenzielai]

Great explanations :) Helped me loads on finishing my required practical stats tests :)
One question though - when doing the paired t-test, surely the n value should be n-1 instead? It's what the textbook says? (I could be wrong)

[yumnabarhamji]

thank you so much youve taught me all of bio statisitics!

[isacl]

What if you were to say that there is a significant difference between the mean of the leaves? The issue there is the t-test value is to reject the null hypothesis?

[TylerJamesTalks]

This is a really good video! Thank you Mrs H :D

[alessandrodinicola]

Thank you very much, i watched your video and it is really clear! Mrs H, i have a curiosity if you can answer to me.
What happens if we have two samples of different sizes from two different populations (let's say 10 values from a population control and 3 values from a post treatment population). Does something change in the unpaired t-test formula to compute the critical value of the t? Thank you in advance 🙂

[bsamuelss]

Hi, im a little confused with the degrees of freedom for the students t-test, in my textbook it says df = (n1 + n2)- 2, whereas in your video it says df is n -1?

[zariyahsaoirse]

Mrs, what's the difference between comparing 2 means using sd, and using t-test?

I know you don't have to use the critical value for sd, since it's about drawing error bars I guess, but how would I know that I should the t-test instead of sd?

[emmanuelmensah]

This is a very good video. So if i am comparing exam results from same school with different students, do i use paired or unpaired t-tests?

[leen]

sorry what is the difference of standard deviations and how did yo get it ?

[saniaislam]

I’m just confused how to put the numbers in stat mode because the frequency part is confusing what steps do I do on my Casio calculator (I have the older ones)

[lanongphichit]

What if the t test results came out as a negative number ? And the number is bigger than a critical value is it still reject the null hypothesis?