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Author Topic: biology paper 5  (Read 10783 times)

Offline ruletheworld

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Re: biology paper 5
« Reply #15 on: June 05, 2009, 05:32:37 am »
dude i think ur wrong abt the chi square...
if the value lies in the range ABOVE 0.05 it is said the the difference is not significant and the null hypothesis is accepted
while if it is below 0.05, the chance that the difference is caused by random error is only 5% so the null hypothesis is rejected...and we get that the difference is caused by a certain factor other than experimental error.

check it here: http://biologymad.com/
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Offline naffy

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Re: biology paper 5
« Reply #16 on: June 05, 2009, 05:46:17 am »
anyone manage to calculate the standard deviation and stdrd error in sp07?
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Offline demonrc

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Re: biology paper 5
« Reply #17 on: June 05, 2009, 06:15:08 am »
well dude u bta check up the cie bio text book.........it says tht if it is greater the difference is significant....n less meanin mre due to chnce n it is not significant
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Offline siddiss

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Re: biology paper 5
« Reply #18 on: June 05, 2009, 06:52:19 am »
anione in pakistan around
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Offline siddiss

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Re: biology paper 5
« Reply #19 on: June 05, 2009, 07:08:06 am »
@ naffy...can u do the standard deviation now???
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Offline siddiss

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Re: biology paper 5
« Reply #20 on: June 05, 2009, 07:10:11 am »
if u have the markscheme gimme the answer...dont feel like opening it...was the s.e for A 17.2...hit me back ASAP
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Offline siddiss

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Re: biology paper 5
« Reply #21 on: June 05, 2009, 07:12:52 am »
sorry 354 rather
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Offline naffy

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Re: biology paper 5
« Reply #22 on: June 05, 2009, 07:50:13 am »
A  s= 2.23, SM =.1.58;;
B  s= 2.49, SM = 0.79;;

did u get the ans?
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Offline 1510

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Re: biology paper 5
« Reply #23 on: June 05, 2009, 08:18:23 am »
hey even cie book says the same....if the probability obtained is greater than 0.05 (5%)...which includes 0.1 ,0.2..this means it is not significant(due to chance) and if we get a probability that is less than 0.05 it means its significant(not due to chance)....this the the chi square test....if its the t-test....if the value obtained is greater than the critical value it is significant.......
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Offline iz

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Re: biology paper 5
« Reply #24 on: June 05, 2009, 08:25:45 am »
if the value obtained is greater than the critcal value it is less than o.05?
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Offline r

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Re: biology paper 5
« Reply #25 on: June 05, 2009, 08:52:37 am »
how do u calculate the degrees of freedom n the probablity?:S
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Offline minz91

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Re: biology paper 5
« Reply #26 on: June 05, 2009, 09:00:02 am »
u guyz check out de syllabus for 09 or 08 tis dere de equations and all in the end. de t test eqn as well as de chi square tests... i have no idea wat to study 4 this exam i thnk u get all de answers by luck  :-\
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Offline hira

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Re: biology paper 5
« Reply #27 on: June 05, 2009, 09:49:57 am »
anybody did the paper? please tell
my frnd realyu needs help
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Offline iz

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Re: biology paper 5
« Reply #28 on: June 05, 2009, 10:05:44 am »
yeh sumone must have done the paper..especially malaysia, pakistan
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Offline SuperSuper

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Re: biology paper 5
« Reply #29 on: June 05, 2009, 10:07:00 am »
hehe..i've done it
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