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Author Topic: plsssssss help urgently!!!  (Read 844 times)

Offline malissa

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plsssssss help urgently!!!
« on: May 11, 2010, 01:27:15 pm »
paper 5 biology CIE! may june 2009 last question:



i attached the question
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Offline osmosis

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Re: plsssssss help urgently!!!
« Reply #1 on: May 11, 2010, 04:02:06 pm »
it says the t-test was carried out on the results for pH4.0 AND pH5.2....and the cultures of EACH pH were sampled at hourly intervals of 20hours...so for pH4.0, the number of degrees of freedom is 20-1=19. for pH5.2, the number of degrees of freedom is 20-1=19. therefore, the number of degree of freedom of THE TEST is the sum of the two number of degree of freedom, which is 19+19=38....
that's what I understand from the question...correct me if I'm wrong.... :)
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Offline malissa

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Re: plsssssss help urgently!!!
« Reply #2 on: May 11, 2010, 08:46:32 pm »
ur terrific!!!! mashallah =)
ill fly over to Kuantan for some tutoring xP
UR THE BEST!! :)
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Offline osmosis

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Re: plsssssss help urgently!!!
« Reply #3 on: May 12, 2010, 11:50:23 am »
yeah, right.....I was just trying my best to help....however, I still do need help in my biology....
that's nice if you wanna come here.... :)
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