Qualification > Sciences
biology paper 5
narnia:
--- Quote from: plasmatissue on June 06, 2009, 12:20:35 pm ---
--- Quote from: demonrc on June 06, 2009, 04:37:30 am ---38 was the degree of freedom...!! ;)
--- End quote ---
38?! i wrote 1! whered you get 38 from?! or 19?...theres only two ph being considered...!
--- End quote ---
it wz sed in d ques......readings ver taken at HOURLY intervals for 20 HRZ!!! dt mnz 40 readings ver taken
bt i wrote 39 ???
bottlerockets:
The degree of freedom was one!!
Two pH values were tested, so 2-1=1!!!!
RIGHT?! :o :'(
naffy:
degree of freedom for t test is (n-1)+(n-1) right? with n=no of data for 1 ph. so the ans is 38.
plasmatissue:
--- Quote from: Z on June 06, 2009, 02:25:50 pm ---
--- Quote from: plasmatissue on June 06, 2009, 12:20:35 pm ---
--- Quote from: demonrc on June 06, 2009, 04:37:30 am ---38 was the degree of freedom...!! ;)
--- End quote ---
38?! i wrote 1! whered you get 38 from?! or 19?...theres only two ph being considered...!
--- End quote ---
it wz sed in d ques......readings ver taken at HOURLY intervals for 20 HRZ!!! dt mnz 40 readings ver taken
bt i wrote 39 ???
--- End quote ---
wait a minute. didnt the Q. say 20 hour interval but not for how long???
plasmatissue:
--- Quote from: naffy on June 06, 2009, 03:26:28 pm ---degree of freedom for t test is (n-1)+(n-1) right? with n=no of data for 1 ph. so the ans is 38.
--- End quote ---
wat wat?!! ???
ok, this is sad... :-\
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