anyone good at chem?

[ManBearPig]

whats the standard deviation of this (to appropritate sig figs)?

12.50
12.50
12.49
12.50
12.49

ive tried everything but the online program wont accept any of it

 

[RedArmy]

In sig figs can't the answer only go as far as what the examples were posted to? If your numbers only go to 12.XX then the answer can only be to .XX and the standard deviation is smaller then that (~.005) so I think it would be 0. Don't quote me on this though, Im sketchy in this area

 

[l6873]

0.0049

 

[ManBearPig]

Originally posted by: l6873
0.0049

didnt work

 

[l6873]

how didn't it work?

 

[booboisie]

Have you tried using scientific notation for the deviation?

 

[Inspector Jihad]

.01

dont the number of decimal place have to equal the smallest one...in this case 2?

 

[SVT Cobra]

I know sig figs, but I have no idea what you are asking.

 

[Strk]

0.0063

Yeah, I know it's not to the appropriate sig figs

 

[siameseplease]

Originally posted by: RedArmy
In sig figs can't the answer only go as far as what the examples were posted to? If your numbers only go to 12.XX then the answer can only be to .XX and the standard deviation is smaller then that (~.005) so I think it would be 0. Don't quote me on this though, Im sketchy in this area

 

[Shawn]

What does this had to do with chem?

 

[madeupfacts]

Originally posted by: Heen05
whats the standard deviation of this (to appropritate sig figs)?

12.50
12.50
12.49
12.50
12.49

ive tried everything but the online program wont accept any of it

u know excel does this 4 u. Put all lnumber in colum and hit standard drviation

 

[Fenixgoon]

Originally posted by: madeupfacts

Originally posted by: Heen05
whats the standard deviation of this (to appropritate sig figs)?

12.50
12.50
12.49
12.50
12.49

ive tried everything but the online program wont accept any of it

u know excel does this 4 u. Put all lnumber in colum and hit standard drviation

qft

standard deviation = stats

sig figs = chem

 

[WENEEDLIGHT]

Dude, I remember this! I remember learning this in high school though. Back then, it was easy. Looking back at it, it seems hard now. haha!

 

[ManBearPig]

i tried putting it in excel but it didnt work.

0.0049 or 0.0063 isnt working either

 

[MazerRackham]

Have you tried 0.00 or 0.01?

 

[wtfbbq]

Standard deviation of C1 = 0.00547723

 

[duragezic]

The standard devation is easily found with Excel, a graphing calc, etc.

Shows it as 0.005477226

I believe sig figs in standard deviations is done to one signicant figure.

Then it comes to rounding. If the next number is >= 5, round up, else round down. I think there are other conventions but I dont remember them and if they are widey accepted. But .005477 is closer to .01 than .00.

So the answer should probably be .01

 

[madeupfacts]

Originally posted by: Heen05
i tried putting it in excel but it didnt work.

0.0049 or 0.0063 isnt working either

errrrrr....///???? u r wierd

fine put in matlab this

a = [12.50 12.50 12.49 12.50 12.49]
std(a)