Hi could someone please explain why in the june 2010 paper the answer to question 5d(ii) is 8. I don't understand how they got the answer. Also, could someone please how the apparatus used in question 4 works? I don't understand how the potometer allows you to measure rate of water uptake.
In standard deviation, 'overlap' means that the results are more likely to be due to chance, right?
I really don't understand how you can tell if it's 'overlapping' just by looking at the numbers, and I really don't understand why overlapping means the results are more likely to be due to chance.
Sorry for the bad wording, hoping someone might be able to help me out here.
In standard deviation, 'overlap' means that the results are more likely to be due to chance, right?
I really don't understand how you can tell if it's 'overlapping' just by looking at the numbers, and I really don't understand why overlapping means the results are more likely to be due to chance.
Sorry for the bad wording, hoping someone might be able to help me out here.
With the numbers, generally they show the +/- SDs alongside the values. You generally see if they over lap or not if the values are different to each other but if you find it difficult then you can just add and subtract the SDs from the value giving you a range for reach value. Looking at the ranges you can tell if there's any overlap or not.
Standard deviation shows spread of data about the mean. If there's overlap in standard deviation then that means that any difference in the results is more likely due to chance. In order for any difference in results not being due to chance then you would expect there to be no overlap,
Could someone please clarify that reason of one of the answers being 'less carcinogens' for 10e(iii) jan 2012 paper is because the reduced blood flow means lesser amount of carcinogens being received in those certain parts of the brain?
Ah, then I believe its diffusion... I always thought any movement of water was osmosis.
EDIT: In my Nelson Thornes textbook, it says "osmosis" and the differences in water potential that make the water move through the symplastic & apoplastic pathways.
With the numbers, generally they show the +/- SDs alongside the values. You generally see if they over lap or not if the values are different to each other but if you find it difficult then you can just add and subtract the SDs from the value giving you a range for reach value. Looking at the ranges you can tell if there's any overlap or not.
Standard deviation shows spread of data about the mean. If there's overlap in standard deviation then that means that any difference in the results is more likely due to chance. In order for any difference in results not being due to chance then you would expect there to be no overlap,
Does this make sense? Not the best explanation...
I was confused with SD but now it makes more sense! Thank you
With the numbers, generally they show the +/- SDs alongside the values. You generally see if they over lap or not if the values are different to each other but if you find it difficult then you can just add and subtract the SDs from the value giving you a range for reach value. Looking at the ranges you can tell if there's any overlap or not.
Standard deviation shows spread of data about the mean. If there's overlap in standard deviation then that means that any difference in the results is more likely due to chance. In order for any difference in results not being due to chance then you would expect there to be no overlap,