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lou p lou
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#1
i have the basic forumla for s.d.- i can work it out on the computer, by hand, in my sleep etc.
but for my stats coursework i need to prove something has a normal distribution and i do this by finding one standard deviation from the mean, then 2 and then 3. but i don't how to do that...
can anyone help at all? rep will be plentiful for anyone who obliges *although brownie points do go to those who, albeit unsuccesfully, tried to help me in the academic bit*
lou xxx
but for my stats coursework i need to prove something has a normal distribution and i do this by finding one standard deviation from the mean, then 2 and then 3. but i don't how to do that...
can anyone help at all? rep will be plentiful for anyone who obliges *although brownie points do go to those who, albeit unsuccesfully, tried to help me in the academic bit*
lou xxx
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elpaw
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#2
(Original post by lou p lou)
finding one standard deviation from the mean, then 2 and then 3.
finding one standard deviation from the mean, then 2 and then 3.
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Vienna
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#3
(Original post by lou p lou)
i have the basic forumla for s.d.- i can work it out on the computer, by hand, in my sleep etc.
but for my stats coursework i need to prove something has a normal distribution and i do this by finding one standard deviation from the mean, then 2 and then 3. but i don't how to do that...
can anyone help at all? rep will be plentiful for anyone who obliges *although brownie points do go to those who, albeit unsuccesfully, tried to help me in the academic bit*
lou xxx
i have the basic forumla for s.d.- i can work it out on the computer, by hand, in my sleep etc.
but for my stats coursework i need to prove something has a normal distribution and i do this by finding one standard deviation from the mean, then 2 and then 3. but i don't how to do that...
can anyone help at all? rep will be plentiful for anyone who obliges *although brownie points do go to those who, albeit unsuccesfully, tried to help me in the academic bit*
lou xxx
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lou p lou
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#4
(Original post by elpaw)
what do you mean by this bit?
what do you mean by this bit?
the only help i can give is that i know a certain percnatge of all data should be within 1 s.d. and by 3 s.ds about 98% of all the data should be included.
but i really am incredibly vague on what the hell i'm meant to be doing *and my teacher is really unapproachable*
argh!!!!!!!
lou xxxx
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me!
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#5
(Original post by lou p lou)
that's my problem, i don't really know. my teacher was just like 'test for normality by finding 1 s.d. from the mean and then 2 and then 3'
the only help i can give is that i know a certain percnatge of all data should be within 1 s.d. and by 3 s.ds about 98% of all the data should be included.
but i really am incredibly vague on what the hell i'm meant to be doing *and my teacher is really unapproachable*
argh!!!!!!!
lou xxxx
that's my problem, i don't really know. my teacher was just like 'test for normality by finding 1 s.d. from the mean and then 2 and then 3'
the only help i can give is that i know a certain percnatge of all data should be within 1 s.d. and by 3 s.ds about 98% of all the data should be included.
but i really am incredibly vague on what the hell i'm meant to be doing *and my teacher is really unapproachable*
argh!!!!!!!
lou xxxx
EDIt: on this site http://www.robertniles.com/stats/stdev.shtml
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Geogger
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#6
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#6
(Original post by lou p lou)
that's my problem, i don't really know. my teacher was just like 'test for normality by finding 1 s.d. from the mean and then 2 and then 3'
the only help i can give is that i know a certain percnatge of all data should be within 1 s.d. and by 3 s.ds about 98% of all the data should be included.
but i really am incredibly vague on what the hell i'm meant to be doing *and my teacher is really unapproachable*
argh!!!!!!!
lou xxxx
that's my problem, i don't really know. my teacher was just like 'test for normality by finding 1 s.d. from the mean and then 2 and then 3'
the only help i can give is that i know a certain percnatge of all data should be within 1 s.d. and by 3 s.ds about 98% of all the data should be included.
but i really am incredibly vague on what the hell i'm meant to be doing *and my teacher is really unapproachable*
argh!!!!!!!
lou xxxx
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lou p lou
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#7
(Original post by me!)
I think you need to draw the graph thing, I read about this somewhere...
EDIt: on this site http://www.robertniles.com/stats/stdev.shtml
I think you need to draw the graph thing, I read about this somewhere...
EDIt: on this site http://www.robertniles.com/stats/stdev.shtml
me thinks i'm going to have to dig out every piece of stats info i have on s.d. *looks at horrible pile of notes + textbooks + revision guides + psychology stats books....*
cheers everyone.
lou xxx
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