How to draw Error Bars/Standard Deviation bars on a graph?

How do you draw error bars/ standard deviation bars on graph.

My mean is 139.0
standard deviation is 53.41

how do i draw the bar on my graph?

anything will help
thanks in advance :yep:

Reply 1

Eloades11

17

Original post by crazyness

How do you draw error bars/ standard deviation bars on graph.

My mean is 139.0
standard deviation is 53.41

how do i draw the bar on my graph?

anything will help
thanks in advance :yep:

Sorry about the long wait (3 years :redface:

) I was searching for something and this thread came up.
You work out the error bars using the formula SE=SD/sqrt n and then when you plot this, you plot the mean, and then 2x above and below the mean.
Although I'm guessing you figured this out 3 years later...

Reply 2

Farhan.Hanif93

18

Original post by Eloades11

Sorry about the long wait (3 years :redface:

) I was searching for something and this thread came up.
You work out the error bars using the formula SE=SD/sqrt n and then when you plot this, you plot the mean, and then 2x above and below the mean.
Although I'm guessing you figured this out 3 years later...

You cannot be serious... :p:

Reply 3

Eloades11

17

Original post by Farhan.Hanif93

You cannot be serious... :p:

Its never too late to help someone :wink:

Spoiler

Reply 4

ihatesigningup

hahahaha amazing :biggrin:

but r u sure its x2 on both sides i though it was just once?

Reply 5

Eloades11

17

Original post by ihatesigningup

hahahaha amazing :biggrin:

but r u sure its x2 on both sides i though it was just once?

Who would have thought this thread was still going :tongue:

It is definitely x2 above and below the mean, it basically means that doing 2x above and below means the chances of the true value lying outside the bars is less than 5%(x2 makes it more accurate)