Recent content by bennyska

  1. B

    Probablity question (confused on the pdf)

    oh, got it. duh. thank you.
  2. B

    Probablity question (confused on the pdf)

    well, the actual problem is show that this function is a pdf. so i need to show that it integrates to 1, which it does, but i believe i also need to show that it's bounded by 0 and 1 for all x in the domain, which is the problem i'm having a hard time with.
  3. B

    Probablity question (confused on the pdf)

    Homework Statement [itex] $f(x)=\begin{cases} 7(4)^{-i} & x\in(\frac{1}{2^{i}},\frac{1}{2^{i-1}}],i=1,2,3,...\\ 0 & 0\geq x,x>1 \end{cases}$ (please excuse the poor latex) Homework Equations The Attempt at a Solution the problem i'm having is say x=3/4. then according to the pdf...
  4. B

    Basic stats question involving borel sets

    Homework Statement http://i.imgur.com/tjpka.png (the actual problem is the third part down) Homework Equations the first two parts are the definition of borel sets,and the second part is a relevant theorem. The Attempt at a Solution so I'm new to Borel sets. And I feel like I'm...
  5. B

    Can you use induction on n cases (as opposed to infinity)?

    alright, sorry i was a bit lazy on the latex, i didn't think it would be that bad originally, and i haven't used latex in a while. i've attached a pdf. how does that look?
  6. B

    Can you use induction on n cases (as opposed to infinity)?

    Homework Statement this is probably a dumb question, but i'm doing this proof where i have to show two sets are equal, where each set is a union from 1 to n sets. this is pretty easy to show with induction, i think, but i'm used to using induction when i have an infinite amount of things, so...
  7. B

    A little help understanding this bayesian problem (very basic)

    thank you. also, i should have been more clear, the third picture was an example with the exact same problem, just fewer balls.
  8. B

    Monotonic 0<an<1 for all n and no two terms are the same

    monotonic refers to how it increases. monotonic increasing means each term is greater than or equal to the term before it. monotonic decreasing means each term is less than or equal to the term before it. if it just says monotonic, either situation will work.
  9. B

    A little help understanding this bayesian problem (very basic)

    the prior probability represents the number of red balls in the urn. i'm told to assume that each possibility is equally likely. so there might be zero balls, 1 ball, 2 balls, etc, up to 9 balls. that should be a 1/10 probability for each case. furthermore, shouldn't the prior column sum up to...
  10. B

    A little help understanding this bayesian problem (very basic)

    Homework Statement so i'm trying to teach myself bayes, and i got a book, and i'm going through trying to do the exercises, and lo and behold, i get stuck on the first one. i thought i was getting it, but the answer given at the back of the book is different than mine. Homework...
  11. B

    R or bayes for independent study?

    well, this is an option https://www.amazon.com/dp/0123814855/?tag=pfamazon01-20 then i'd be doing both thanks for your responses
  12. B

    Two basic questions about education

    also, memorization is important because it allows you to focus on the more important things. after a while it just becomes second nature. it would be hard to do a lot of math if you didn't have certain things memorized, like properties of various operations. you could do it, it would just...
  13. B

    R or bayes for independent study?

    i'm an undergrad in stats, and next semester is my last. i'm doing an independent study next semester, and am unsure of what would be more beneficial for me: a class in R, or bayes. i would like to do bayes, and i'm decent on computers with limited programming experience, so i'm not too worried...
  14. B

    Sequences in complex (just a clarifying question)

    Homework Statement (excuse lack of latex) show that if SUM(zn)= S and SUM(wn= T, then SUM(zn + wn) = S + T Homework Equations The Attempt at a Solution so if i'm doing this right, this is pretty easy, i think. they want me to use a theorem that says if zn=xn +iyn, and SUM(zn)= S, where S...
Top