Qualification > Math
S1 and S2 DOUBTS HERE!!!!
astarmathsandphysics:
I dont have the cie 2001 jun paper. Can you upload it here?
Blizz_rb93:
--- Quote from: astarmathsandphysics on May 26, 2010, 04:07:51 pm ---I dont have the cie 2001 jun paper. Can you upload it here?
--- End quote ---
not the cie the edexcel
6683 code
astarmathsandphysics:
sd=sqrt(sum x^2/n -mean^2)
=sqrt(46625/25-(1075/25)^2)=4
mistak in question sum x^2 should be 46625.
Dont blame me. I only stole them
T.Q:
--- Quote from: Psyclax on May 26, 2010, 04:16:51 pm ---not the cie the edexcel
6683 code
--- End quote ---
Each of the 25 students on a computer course recorded the number of minutes x, to the nearest minute, spent surfing the internet during a given day. The results are summarised below.
,
(a) Find and for these data.
(3)
Two other students surfed the internet on the same day for 35 and 51 minutes respectively.
(b) Without further calculation, explain the effect on the mean of including these two students.
for part a
Blizz_rb93:
--- Quote from: T.Q on May 26, 2010, 04:41:34 pm ---Each of the 25 students on a computer course recorded the number of minutes x, to the nearest minute, spent surfing the internet during a given day. The results are summarised below.
,
(a) Find and for these data.
(3)
Two other students surfed the internet on the same day for 35 and 51 minutes respectively.
(b) Without further calculation, explain the effect on the mean of including these two students.
for part a
--- End quote ---
nvm nvm!! lol
thank you T.Q!!
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