does anyone have basic idea of statistics?

- anonymous

does anyone have basic idea of statistics?

- katieb

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- anonymous

I have this table
Puppy # Weight
1 16
2 46
3 34
4 31
5 21
6 26
7 22
Sum 196

- anonymous

and the question states d) Would it be reasonable to state that this litter contained two “unusual” puppies; i.e., a runt and a giant? Why or why not?
I know my mean is 28, S.D. is 9.27 and my 95% C.I is (9.83, 46.17) but dont know what this question is asking

- anonymous

and also should i use sample S.D. or population S.D.

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- anonymous

what i used was population S.D

- KingGeorge

I think population is the correct one.
Basically, I think the question is asking if you have two outliers in your data. In particular, you have a puppy that weighs 16, and one that weighs 46. Using your S.D. and CI, I think you're supposed to figure out if those puppies are "unusual."

- anonymous

but if it lies in the CI can i say its normal or do i have to do some tests?

- KingGeorge

I'm honestly not sure. If it lies in the CI though, I would tend to think it's still normal.
But I'm not sure. It's been quite a while since I've had any statistics.

- anonymous

yeah same lol alright ill keep searching on the web :)

- KingGeorge

Good luck!

- anonymous

- UnkleRhaukus

how may standard deviation away, are the outliers from the mean ?

- anonymous

what do you mean by that ?

- anonymous

like i dont know what that question means. what i wrote is its not reasonable since all those values lie in the confidence intevral so its not unsual i dont know if that is right

- UnkleRhaukus

|dw:1361763918248:dw|

- UnkleRhaukus

most of the data is within one standard deviation of the mean

- anonymous

so can i say everything is reasonable

- anonymous

or should i argue puppy with weight 16 and 46 are unsual

- UnkleRhaukus

i reckon those two are unusual

- anonymous

true thanks a lot :)

- anonymous

I have another question would you just tell me if i am doing it right

- UnkleRhaukus

ok

- anonymous

well its on another site if thats okay

- anonymous

i did all my calculations but i know my last question is wrong cuz i got a small n value

- anonymous

http://stats.stackexchange.com/questions/50779/calculating-the-n-value#comment99361_50779

- anonymous

im confident a is right, b is 95% right and i know c is wrong lol

- UnkleRhaukus

i think your are on the right track for b, and im not sure about c , sorry

- anonymous

oo its alright, and I just got one more probability question and thats it for today if you dont mind

- anonymous

http://stats.stackexchange.com/questions/50784/using-the-bayes-theorem
i dont know if i got the probabilities wrong from the question but dont know

- UnkleRhaukus

im sorry i cant be more helpful ,
maybe post your question here http://openstudy.com/study#/groups/Statistics

- anonymous

you have a puppy that weighs 16, and one that weighs 46. Using your S.D. and CI, I think you're supposed to figuure out if those puppies are unusual.

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