Basically i need to calculate the standard deviation of sample values as they are recieved, but without having to save all previous sample values. eg if i all the info i have is the number of values (n) and the mean of those values (m) and the standard deviation for those values (sd) is it possible to recalculate the standard deviation when given an extra sample value?

2007-02-14 22:26:25 · 1 answers · asked by Anonymous in Mathematics

0 ⤊

circuit diagram for radio frequency based remote control system for ac main using fm technique?

2007-02-14 22:23:02 · 1 answers · asked by r s 1 in Engineering

3 ⤊

what is large US city?

2007-02-14 22:22:38 · 12 answers · asked by Beauty I 1 in Earth Sciences & Geology

2 ⤊

describe cell division?

2007-02-14 22:21:14 · 2 answers · asked by Anonymous in Biology

0 ⤊

what is the chemical reaction of coke mixed with mentos?

2007-02-14 22:21:08 · 4 answers · asked by maddy 1 in Chemistry

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Do extra-terrestrial creatures really exist?

Has any real and concrete incident of UFO sighting ever taken place?

2007-02-14 22:19:06 · 16 answers · asked by Anonymous in Astronomy & Space

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Real, living robots?

http://www.youtube.com/watch?v=azPWJiKWd0U

Please watch this video. This is not a real person. This is a robot that Japanese people have produced.

It is very realistic. But even so, it still is not "alive".
What do you think makes things "live"?
Is this something encoded in our genes before we are born?
Or do we gain conscience from something else, say, god or something later?

If we find out what living and conscience is, could we encode it software wise into robots to make them living too?

Do you think we will ever be so advanced, the computers can decrypt an entire cell & tell us exactly what a person will look like upon reaching adulthood based on the genetic coding built into the cell reguarding living, growing, becoming an adult?

Imagine if we can record our life force to use after we die in another mind or something, reprogram it back?

Answers, anyone?

2007-02-14 22:18:37 · 2 answers · asked by Anonymous in Biology

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PHI (1.618) pronounced 'fee'(Not Pi) is called the divine proportion , some examples?

Because it appears everywhere naturally, plants animals even humans possess dimensional properties that adhere to the ratio PHI : 1

Eg The distance from your head to the ground divided by the distance from your navel (bellybutton) to the ground is PHI.

the number of female bees in a hive divided by males will always equal PHI

2007-02-14 22:14:43 · 5 answers · asked by Banderes 4 in Mathematics

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how does the coefficient of friction depend upon the normal force between the surfaces in contact?

i'm doing a physic experiment to investigate about the coefficient of friction by using wooden block

2007-02-14 22:12:44 · 5 answers · asked by siti0012 1 in Physics

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do you know any website where I can find a research topic about health or medicine?

2007-02-14 22:12:19 · 7 answers · asked by Samantha A 1 in Medicine

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Can anyone show me the graph of Drag Coefficient vs. reynolds numbers?

i have to compare my graph to the reference graph... Can anyone show me the theoretical graph of Drag coefficient vs. Reynolds numbers?

2007-02-14 22:11:47 · 2 answers · asked by Zacky I 1 in Engineering

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what are the set of factors for 28?

2007-02-14 22:11:45 · 8 answers · asked by jajabida 1 in Mathematics

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periodic table of elements..graphing the atomic number and atomic mass?

1.) i need to label the x -axis as atomic number and label the y-axis as the atomic mass . there are no units for atomic number,but atomic mass has a unit of(u).This stands for atomic mass units.

2.) for each of the first 85 elements in the periodic table,plot a point representing the atomic number(x) and the atomic mass (y).

2007-02-14 22:10:59 · 1 answers · asked by mku1023 2 in Chemistry

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