sandard deviation.

[help-me-please]

what is the SD of these means:

1.234

1.485

2.654

2.827

I have the answers and I want to confirm they are correct! thanks

[vascop]

Tell us what you think the answer is yourself before we help. You ought to at least have a go.

[help-me-please]

I HAVE:

(IN ORDER AS ABOVE)

0.00158

0.00158

0.003


0.004



AM I RIGHT?

[mollykins]

h-m-p are you doing a-level maths? i created a post aimed at you which i don't think you replied to . . .

[ChuckFickens]

Am I missing something here, but surely you can't work out the SD without knowing the value of all the data points that count towards the mean?

[factor-fiction]

The standard deviation of those four figures is 0.807.
But I think you mean (no pun intended) you have taken several samples and you want the standard deviation of the means (SDOM).
I recall you divide your SD by the square root of the number of mean values- which in this case is the square root of 4 , i.e. 2.

So SDOM= 0.403

But I am rusty on this. You need to look it up

[factor-fiction]

http://en.wikipedia.o...rd_error_(statistics)
This may help