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Anyone good at college level statistics???

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Old 02-26-2013, 07:18 PM   #1
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Anyone good at college level statistics???

I have a couple questions on this study guide that the teacher gave us, and I'm completely blanking on it... Anyone good at college level statistics???-imageuploadedbytapatalk1361935058.212017.jpg

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

Can anyone help?
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Old 02-26-2013, 07:26 PM   #2
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I thought I was good at it until I saw this. Realized I forgot most of statistics.
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Old 02-26-2013, 07:26 PM   #3
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D
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Old 02-26-2013, 07:28 PM   #5
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Quote:
Originally Posted by SwanksTaco View Post
The answer is C.
my last post was the grade i made in statistics last year.
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Old 02-26-2013, 07:29 PM   #6
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Quote:
Originally Posted by jgwheeler17 View Post
my last post was the grade i made in statistics last year.
#highschoolswag
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Old 02-26-2013, 07:29 PM   #7
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Got an A in stats... and I remember nothing...
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Old 02-26-2013, 07:30 PM   #8
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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.
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Old 02-26-2013, 07:31 PM   #9
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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...
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Old 02-26-2013, 07:32 PM   #10
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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
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Old 02-26-2013, 07:39 PM   #11
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Quote:
Originally Posted by tacomathunder View Post
I have a couple questions on this study guide that the teacher gave us, and I'm completely blanking on it... Attachment 197942

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

Can anyone help?
C(7,0) is 7 choose 0, also known as binomial coeff. There's a function on scientific calculators for that...
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Old 02-26-2013, 07:40 PM   #12
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Quote:
Originally Posted by SwanksTaco View Post
#highschoolswag
not in high school..
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Old 02-26-2013, 07:40 PM   #13
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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
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Old 02-26-2013, 07:47 PM   #15
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Quote:
Originally Posted by KenLyns View Post
C(7,0) is 7 choose 0, also known as binomial coeff. There's a function on scientific calculators for that...

Mmm, still pretty sure it's a combination.

7 combination 0=


7!
_______

0!(7-0)!
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Old 02-26-2013, 07:53 PM   #16
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I just had to go and check my transcript. Somehow I got a B in Business Statistics and remember nothing.
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Old 02-26-2013, 07:59 PM   #17
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Quote:
Originally Posted by Squeaky Penguin View Post
Mmm, still pretty sure it's a combination.

7 combination 0=


7!
_______

0!(7-0)!
Just use WolframAlpha. For example, C(7,3) = 35.

http://www.wolframalpha.com/input/?i=c%287%2C3%29
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Old 02-26-2013, 08:05 PM   #18
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True,

but if you look at my first post that's only the first part of the formula...
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Old 02-26-2013, 08:06 PM   #19
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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
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Old 02-26-2013, 08:14 PM   #20
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Quote:
Originally Posted by tacomathunder View Post
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
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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