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Search results

  1. M

    Continuity Correction Factor

    Indeed.
  2. M

    Continuity Correction Factor

    If P(X=n) use P(n – 0.5 < X < n + 0.5) If P(X>n) use P(X > n + 0.5) If P(X≤n) use P(X < n + 0.5) If P (X<n) use P(X < n – 0.5) If P(X ≥ n) use P(X > n – 0.5) HTH
  3. M

    normal distribution equality sign (<>) jargons

    some helpful rules i wrote some time ago: P(Z < z) = Φ(z) P(Z > a) = 1 – Φ(a) Negative values of z P(Z < –a) = 1 – Φ(a) P(Z > –a) = Φ(a) P(Z < –a) = P(Z > a) P(Z > –a) = P(Z < a) Important rules P(a < Z < b)= Φ(b) – Φ(a) P( –a < Z <b)= Φ(b) + Φ(a) – 1 P(–b <Z <–a)= Φ(b) – Φ(a) P(|Z| <a)=2 Φ(a)...
  4. M

    conditions for binomial and normal dist

    hi, what are the conditions for: a) binomial distribution b) normal distribution
  5. M

    statistics paper 1 discussion

    ya sure.. what is the probability that tomorrow's paper will be hard for 20% boys and 5% girls.
  6. M

    guesses about tomorw's paper stats???????

    very tough, in light of P1 and P3
  7. M

    stats arrangement question

    From a group of ten people, four are to be chosen to serve on a committee. among the ten people, there is one married couple. find the probability that both the husband and the wife will be chosen. (the correct answer is 2/15)
  8. M

    Any tips or notes for permutation and combination?

    excellent notes on permutation and combination!! really helpful http://www.youtube.com/watch?v=Dsi7x-A89Mw
  9. M

    permutation queston

    2x5! + 2x5! = 2x2x5! is the right answer, i dont know why
  10. M

    Any tips or notes for permutation and combination?

    me too, specially questions involving keywords like "next to each other"
  11. M

    permutation queston

    i) = 2 x 6! - 2x2x5! = 960 i dont know how :(
  12. M

    permutation queston

    (h) You are arranging six of your friends Alice, Bob, Charles, Diana, Francine, and George, in a row so that you can take their picture. (i). Alice and Bob have had a fight and refuse to stand next to eachother. How many ways are there to arrange your six friends?
  13. M

    maths s1 june 2008 q3(i)

    Amna, what does not make sense to me is where does 3factorial and 9fatorial come? or say its understandable that 3! is representing jazz, but what is 9! representing here? how did you know its 9?
  14. M

    Maths S1 using calc for mean and s.d.

    OH MY!!! I'll simply use the stat feature!!!!!!
  15. M

    maths s1 june 2008 q3(i)

    what is the meaning of "if the jazz CDs are all next to each other" what is the translation of this french?
  16. M

    Maths S1 Graph paper?

    where can i download a graph template so that i can print it with my printer?
  17. M

    Maths S1 using calc for mean and s.d.

    so the best way is to: write formula, plugin values calculate the values using whatever correct method is on your caclculator write your answer.
  18. M

    maths q3 june 2009 s12

    how to read the central tendency?
  19. M

    Maths (S1)

    khanacademy or youtube all those keywords :)
  20. M

    Maths S1 using calc for mean and s.d.

    Hi, I have confusion on using calc to solve simple mean and s.d. questions for example a raw data have been given e.g 1,2,3,41,31,55,32,45,73,12 etc if the question asks for what the mean is, should we write them all with sum and divide with 'n' and so on to show the working or just simply...
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