Recent content by ivan_x3000

  1. I

    Last stat question nearly done

    So... what did you did think of my answer haha 0.5*0.35
  2. I

    How Does Hypergeometric Distribution Calculate Equal Feathered Arrows Remaining?

    I went with hyper geometric aiming to use up 9 red and 3 green, living 4 of each.
  3. I

    Last stat question nearly done

    Actually nah new idea... use a tree diagram and it's a 0.5*0.35
  4. I

    Last stat question nearly done

    Homework Statement Of all archers at one particular competition 50% are local (1/2) 40% come from another state (2/5) 10% are international (1/10) At the end of the competition some of the archers choose to go on a specially organised bus tour Of the locals 35% go on the tour...
  5. I

    Understanding Archery Risks: RSI & Eye Strain

    How about S={0.57, 0.036, 0.912}
  6. I

    Understanding Archery Risks: RSI & Eye Strain

    how about now?
  7. I

    Understanding Archery Risks: RSI & Eye Strain

    a) Let a=RSI, b=eye strain, a'c'=a^c*a^c=neither P(a)=0.057, P(b)=0.036, P(a'b')=0.912 b) S[0.57, 0.036, 0.912] c) (0.057)*(0.036)=0.002052 d) The values are statistically independent, in oder to to be statistically dependent at least one of the outcomes must have an effect on the other this...
  8. I

    How Does Hypergeometric Distribution Calculate Equal Feathered Arrows Remaining?

    Homework Statement (a) At the start of the competition, Shirley has 20 arrows in her quiver (a quiver is a container which holds arrows). 13 of Shirley’s arrows have red feathers, and 7 have green feathers. Arrows are not replaced when they are shot at the target. (i) At the end of the...
  9. I

    Understanding Archery Risks: RSI & Eye Strain

    Homework Statement Each year, 5.7% of archers develop repetitive strain injury (RSI) in their arm. Each year, 3.6% of archers develop problems related to eye strain. However, 91.2% of archers develop neither. (a) Formally define sensible event notation, and summarise the information in the...
  10. I

    Use trig identities to show that

    Homework Statement use trig identities to show that (b) cos(tan^(−1)[x])=1/√(1+x^2) for −1/2π<x<1/2π. Homework Equations i think Pythagoras has to applied but that is geometric reasoning hmm The Attempt at a Solution
  11. I

    Polynomials and complex numbers

    Thank you so much that is a great hint haha
  12. I

    Polynomials and complex numbers

    Sorry it is (u+iv)^-3 my bad
  13. I

    Polynomials and complex numbers

    Yes definitely a type it was meant to be (u+iv)^3
  14. I

    Polynomials and complex numbers

    Homework Statement Suppose that u and v are real numbers for which u + iv has modulus 3. Express the imaginary part of (u + iv)^−3 in terms of a polynomial in v.Homework Equations The Attempt at a Solution |u+iv|=3 then sort(u^2+i^2) = 3 then u = 3 and v=0 or u=0 and v=3(0+3i)^-3 i swear i am...
  15. I

    Hey where do i begin with this complex polynomial question?

    Wait how come? I'm trying to do the part where i have to show how the assumption is through for polynomials in the complex plane