- Messages
- 83
- Reaction score
- 32
- Points
- 28
you dont need that info to solve part b
Yes i know,those are two questions.
how do we solve question 3b AND how do we know that the t test was for the tubule diameter and not for the diameter of the lumen?
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
you dont need that info to solve part b
yeah they didnt specify but i dont think it really mattered as we could solve without knowing for b u just have to give reasons why its reliable. many measurements were taken etc. however the brush border of columnar cells werent measured so that would make it unreliableYes i know,those are two questions.
how do we solve question 3b AND how do we know that the t test was for the tubule diameter and not for the diameter of the lumen?
yeah they didnt specify but i dont think it really mattered as we could solve without knowing for b u just have to give reasons why its reliable. many measurements were taken etc. however the brush border of columnar cells werent measured so that would make it unreliable
hmm i dont get it either! it was more simple in the mark scheme!In the examiners report it was mentioned.
I just don't get it
hmm i dont get it either! it was more simple in the mark scheme!
we always take 0.05 in chi square and t-test. in the text book it was written about 0.05 being scientifically proved or something. so just always use 0.05 valueCan somebody explain that in Winter 2008 paper 5 (question 2 b,iv) why cant we take t values when probability=0.01 while finding the solution to the ans?
I'd be grateful if someone gave me a detailed explanation!!
we always take 0.05 in chi square and t-test. in the text book it was written about 0.05 being scientifically proved or something. so just always use 0.05 value
yuppp (Y)Thanks! ok that is fixed always gotta take 0.05!
Owh really ? :O I never knew that :/they didnt mention it but its always supposed to be going downwards
Q2- find the mean of both. before coffee=0.1725 after coffee=0.1525 subtracting them u get 0.02. then 0.02/0.1725*100 u get 11.59 thats almost 12%
Guys can you please help me with question 3b.?
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s08_qp_5.pdf
how do we know that the t-test was done for the tubule diameter and not for the diameter of the lumen?
how to calculate % increase? For example population was 1st 20 and then it became 50. so it will be 50/20*100 giving 250. do we have to subtract 100 from 250? or will the % remain 250%?
Thats % difference not increase solve it in May 2012 52 q2bii)it will be [ (50-20)/20 ] x 100 %
how to calculate % increase? For example population was 1st 20 and then it became 50. so it will be 50/20*100 giving 250. do we have to subtract 100 from 250? or will the % remain 250%?
oh okay i got the same answer but in a diff method but still let me know what u got in that qstn!it will be [ (50-20)/20 ] x 100 %
May 2012 52 .. 2b)ii) is 400% in the mark scheme! but im getting 300% :/
thanx! i do it the 1st way as wel but my answer doesnt match the one in the mark scheme!subtract from 100 --> 250 - 100 = 150%
i do it this way,
for %increase, u first find the increase in population.
ie from 20 ----> 50, so increase = 30
now the increase divided by the original population. ---> 30/20 * 100 = 150 %
All credit to Nibz
so how did the 400% come?The percentage increase would be 300%, but that's not what they're asking for.
They wanted the RELATIVE increase. If you have a 40% sodium chloride solution, that would be eight times as concentrated as a 5% solution, but only a 700% increase. The relative increase would be considered 8 (which is 40/5) rather than (40-5)/5 = 700%.
Going back to the question, you have the value at 60 degrees being 56 and at 50 degrees is 14.
The relative increase is simply 56/14 = 4
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now