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Anyone good at college level statistics???

Discussion in 'Off-Topic Discussion' started by tacomathunder, Feb 26, 2013.

  1. Feb 26, 2013 at 7:18 PM
    #1
    tacomathunder

    tacomathunder [OP] Well-Known Member

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    I have a couple questions on this study guide that the teacher gave us, and I'm completely blanking on it... ImageUploadedByTapatalk1361935058.212017.jpg

    I can't figure out how he's getting these numbersin the answers... ie: .0036, .032 etc.

    Can anyone help?
     
  2. Feb 26, 2013 at 7:26 PM
    #2
    RAT PRODUCTS

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    I thought I was good at it until I saw this. Realized I forgot most of statistics.
     
  3. Feb 26, 2013 at 7:26 PM
    #3
    jgwheeler17

    jgwheeler17 I'm a zit. Get it?

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  4. Feb 26, 2013 at 7:27 PM
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    Swank

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    The answer is C.
     
  5. Feb 26, 2013 at 7:28 PM
    #5
    jgwheeler17

    jgwheeler17 I'm a zit. Get it?

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    my last post was the grade i made in statistics last year. :D
     
  6. Feb 26, 2013 at 7:29 PM
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    Swank

    Swank Certified Mall Crawling Instructor™

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    #highschoolswag
     
  7. Feb 26, 2013 at 7:29 PM
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    EDJY

    EDJY Well-Known Member

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    Got an A in stats... and I remember nothing...
     
  8. Feb 26, 2013 at 7:30 PM
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    RAT PRODUCTS

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    I think I got like a C+ in engineering statistics. Didn't try at all in that class. No curve like there should've been. The professor was a frickin grad student. First class he'd ever taught.
     
  9. Feb 26, 2013 at 7:31 PM
    #9
    dmz1241

    dmz1241 Well-Known Member

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    im "studying" for a college stat exam right now as well. Yours must be a harder class. Cant help you there, good luck though...
     
  10. Feb 26, 2013 at 7:32 PM
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    Squeaky Penguin

    Squeaky Penguin "young Brett"

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    Looks to be binomial probabilty distribution. Uses a form of the combination fomula.

    P(x)=nCxPi^x (1-Pi)^n-x
    (not the best way to type a formula)


    You should have a table in the back of your book that basicly gives you the answers.
    C=combination
    n=the number of samples, in this case 7
    PI=the probibily of a success, in this case .55
     
  11. Feb 26, 2013 at 7:39 PM
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    KenLyns

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    C(7,0) is 7 choose 0, also known as binomial coeff. There's a function on scientific calculators for that...
     
  12. Feb 26, 2013 at 7:40 PM
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    jgwheeler17

    jgwheeler17 I'm a zit. Get it?

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    not in high school..
     
  13. Feb 26, 2013 at 7:40 PM
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    tacomathunder

    tacomathunder [OP] Well-Known Member

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    Thats what I am having trouble with, like i see that these are the answers... but I dont know how the hell to compute it, its crazy
     
  14. Feb 26, 2013 at 7:41 PM
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    Swank

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    I am. ;)
     
  15. Feb 26, 2013 at 7:47 PM
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    Squeaky Penguin

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    Mmm, still pretty sure it's a combination.

    7 combination 0=


    7!
    _______

    0!(7-0)!
     
  16. Feb 26, 2013 at 7:53 PM
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    Newman

    Newman .

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    I just had to go and check my transcript. Somehow I got a B in Business Statistics and remember nothing.
     
  17. Feb 26, 2013 at 7:59 PM
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    KenLyns

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  18. Feb 26, 2013 at 8:05 PM
    #18
    Squeaky Penguin

    Squeaky Penguin "young Brett"

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    True,

    but if you look at my first post that's only the first part of the formula...
     
  19. Feb 26, 2013 at 8:06 PM
    #19
    tacomathunder

    tacomathunder [OP] Well-Known Member

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    think i got it, so to figure out those numbers you go 7 nCr 0 then multiply by the rest of the equation, and so on.... that was the hard part out of the way... then everything else is just plugging in crap... think i got this one after an hour lol
     
  20. Feb 26, 2013 at 8:14 PM
    #20
    Squeaky Penguin

    Squeaky Penguin "young Brett"

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    Sounds like you got it. They way he wrote the answer didn't make it clear he was doing the nCr combination stuff.
     
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