Quick question - can a choice chamber be used for investigating the effect of temperature? Or would it be too difficult to control the two temperatures?
If your chi squared value is less than the critical value, do you not reject your null hypothesis because the difference is significant as the probability of chance is low?
No, if your Chi squared value is greater or equal to critical value, the probability it's due to chance is less than 5% and vice versa. Larger than critical value- reject null hypothesis (Significant). Smaller than critical value- accept null hypothesis (Not significant).
There's an error with the interpretation. The chi squared test is testing the result against a random result. The chi squared result is less than the critical value which means that the result are NOT random. If the result were above the critical value this would mean that the results are random.
I don't think so.." If Chi Squared is equal to or greater than the critical value REJECT the null hypothesis. There is a SIGNIFICANT difference between the observed and expected values. If Chi Squared is less than the critical value, ACCEPT the null hypothesis. There is NO SIGNIFICANT difference between the observed and expected values"
I see in your 2nd trial you have 19 woodlice recorded as opposed to 20 - is this a feature that can come up in tomorrow's exam for us to talk about inconsistent trial sample sizes? And will we also be asked to explain why in the same experiment there are less numbers in 1 trial than in another?
I calculated the chi-squared test and found x2= 2.32, as my calculator rounded up, (e.g. for 3.3-5= -1.7 instead of -1.67 would this be accepted in an exam?
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got my practical tomorrow super helpful thanks
Please can you do a video on all the statistical tests in A-level biology? I really love your videos they are so helpful
good thinking
Ethan Crawford bit late now and I still don't know the statistical tests
thank you so much! Has helped me loads!
Quick question - can a choice chamber be used for investigating the effect of temperature? Or would it be too difficult to control the two temperatures?
No
cool experiment!!!!
If your chi squared value is less than the critical value, do you not reject your null hypothesis because the difference is significant as the probability of chance is low?
You're right you would reject the null because they are statistically significant
No, if your Chi squared value is greater or equal to critical value, the probability it's due to chance is less than 5% and vice versa.
Larger than critical value- reject null hypothesis (Significant).
Smaller than critical value- accept null hypothesis (Not significant).
Where can I get a choice chamber like this one, please?
thanks
There's an error with the interpretation. The chi squared test is testing the result against a random result. The chi squared result is less than the critical value which means that the result are NOT random. If the result were above the critical value this would mean that the results are random.
I don't think so.." If Chi Squared is equal to or greater than the critical value REJECT the null hypothesis. There is a SIGNIFICANT difference between the observed and expected values.
If Chi Squared is less than the critical value, ACCEPT the null hypothesis. There is NO SIGNIFICANT difference between the observed and expected values"
I see in your 2nd trial you have 19 woodlice recorded as opposed to 20 - is this a feature that can come up in tomorrow's exam for us to talk about inconsistent trial sample sizes? And will we also be asked to explain why in the same experiment there are less numbers in 1 trial than in another?
no it won't, hope this helped
@@haonesor Cheers bossman
No you will not be asked anything like that. Hope this helps 😃
@@creed9357 Thank you, has really calmed me down 5 and a half years after having my exam 😂
@@BlueKhali glad I could help broski 😂😂
For the exam
are these your videos? did you make them?
Yes I made them very quickly to help my students revise and prepare for practical activities.
Biology Practical Activities and Revision right so this is you on the video speaking?
Nico Di Angelo Yes my voice and my hands. Hope it was useful to you.
chill out you muppet
But it did teach me a bit
I calculated the chi-squared test and found x2= 2.32, as my calculator rounded up, (e.g. for 3.3-5= -1.7 instead of -1.67 would this be accepted in an exam?
youre gonna need a better calculator for your exam
Ru pro life or pro choice 🧐🧐🤨🤨🤨
A terrible intro, absolutely terrible
then dont watch it u bloody fool
@@peanut5669 innit
It's boring and bad I didn't understand anything
That's on u sorry