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day 3 is time when they start taking results and control would only be the one at the start of the exp.that shows %cell survival with no immobilized cells.....means the normal %.....http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w09_qp_52.pdf
i cant undrstand q1...part b........they only showed graph at day 3 for control.....and........watrs happening here
log graph...when u take log of the values shown...u'd get itwat kind of graph is this
YEAH ME TOO DONE WITH THESE PAPERS BUT NOT SATISSFIED............WHAT TO DO KNOW...........done the papers from 2009 to 2011 .....still not satsifed......1st 3 papers i.e 2007 and 8 ones were hell easy...........knw any other source for practice??
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_51.pdf
q2 a why ms doesnt allow volume of culture medium....cos i think nutrient cconc shud be kept constant bt ms says only composition
from a crosshttp://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_53.pdf
Q2..b ii..where do we get expected value from??
dont get itfrom a cross
eg wth out tail symbol A EARLIER SAID WTHOUT TAIL HETRO
Aa *Aa
AA Aa Aa aa
3/4: 1/4
3/4*(72+40) 1/4 *(72+40)
hope it helpssssssssssssss,....................
the probaillity we are talking abt here is probability of null hypothesis being correct......so if its less than 0.05 Null hpotheis is rejected,....and so on...........this 0.05 level is actuallyy 95 PERECENT PROBABILITY THAT NULL HYPOTHESIS IS CORRECT BT DONT KNW HOW,,,,,,SOME frther maths shud be ale to explain this 95 percent thingalso in chi square test if our probability comes out to be greater than 0.05 then its due to chance..what abt t-test??
It's the same. 0.05 act as decider for both chi square test and t-test.also in chi square test if our probability comes out to be greater than 0.05 then its due to chance..what abt t-test??
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