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  1. shafayat

    *Biology Paper 5 tips*

    I think when teachers say 2 Standard error units above and below. by that they mean one above and one below total making two... cuz I didnt find any other Explanation
  2. shafayat

    *Biology Paper 5 tips*

    validity depends on the type of test. chi-squared or t-test reliability depends on the number of times the test is conducted and accuracy depends on instrumentation used during the exp. :') hope it helps
  3. shafayat

    *Biology Paper 5 tips*

    depends on what they're asking .. but in CIE there is no negative marking! if you write more than one.. the first answer is choosen regardless of its accuracy ..
  4. shafayat

    *Biology Paper 5 tips*

    null hypothesis means there is 'NO SIGNIFICANT DIFFERENCE' always.. there is no question of significant or not, cuz its always not...
  5. shafayat

    *Biology Paper 5 tips*

    I just took a google image and edited ...
  6. shafayat

    *Biology Paper 5 tips*

    Assalam Wa'alaikum.. find the two extremes from mean .. i.e 0.156+.001 = 0.157 at pH 4 0.197-0.013=0.184 at pH 5.2 this means the highest value at pH 4 could be 0.157 and lowest value for pH 5.2 could be 0.184 which are far away from each other so when u will draw a curve, there will...
  7. shafayat

    HELPP! Physics p3 related question.

    we don't. cuz human response time gives very less error compared to other possible errors
  8. shafayat

    Physics 34 only

    second question is on terminal velocity?
  9. shafayat

    Physics 34 only

    tempreture one is unlikely ! But the mechanics and moment is pretty sure
  10. shafayat

    Chemistry and Biology Paper 34 ONLY

    expected gt A-25 B-22 All the best people :D
  11. shafayat

    How was Chemistry P34?

    umn ! no, the accuracy marks are for how close our answers lie to the invigilator
  12. shafayat

    How was Chemistry P34?

    eh ? no need for NaHCO3 ! NaCO3 is fine ! cuz it only reacts with acid ! :D
  13. shafayat

    How was Chemistry P34?

    well the question said to use t1 only ! but I kept on taking initial temperature ! cuz my room temp kept changing !
  14. shafayat

    How was Chemistry P34?

    neither did I but its kindof common sense ! you do rough to judge the amount needed ! so you just do hectically but when doing trials ! we do point by point therefore more accurate
  15. shafayat

    How was Chemistry P34?

    not +- 2 its +- 0.2 :P
  16. shafayat

    How was Chemistry P34?

    cant say depends on how examiners mark ! but usually -1 for every .1 difference from your invigilator ! ok ? there fore three mark from accuracy .. probably
  17. shafayat

    How was Chemistry P34?

    man NaOH was correct for me !! then I thought fb7 cudnt be zinc iodide cuz the name sounded too awkward so I wrote lead iodide ! ALTHOUGH I HAD WRITTEN CORRECT AT FIRST :/ I just hate my instincts :? :/ :/ fb9 we only needed to find so4 or so3
  18. shafayat

    How was Chemistry P34?

    yeah yeah !! first I wasn't ! but then after thinking over it I am sure its correct !!
  19. shafayat

    How was Chemistry P34?

    yeah but question asked about accuracy? so I think one more sentence should have been added "LESS ACCURATE'
  20. shafayat

    How was Chemistry P34?

    what you wrote looks perfectly correct to me ! (Y)
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