# Finding Uncertainty Using Upper/Lower Bound

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1. Nov 16, 2015

### AstroKeith

Hello,

I'm working on a lab report and am having a bit of trouble when it comes to figuring out uncertainty.

Trial 1 Acceleration: 0.93 ± 0.14 m/s^2
Trial 2 Acceleration: 0.83 ± 0.35 m/s^2
Trial 3 Acceleration: 0.93 ± 0.14 m/s^2

I have three values listed above and and wanted to find the average of the three along with the new uncertainty of that value but I am unsure of what to do

EDIT: Figured out the upper lower bound issue I was having. I still do not understand how to find the uncertainty in the average though.

Any help would be appreciated. Thanks!

Last edited: Nov 16, 2015
2. Nov 16, 2015

### brainpushups

The best method would probably be to calculate the weighted average by using the uncertainty in each measurement. See this link if you have not done this before (or if you need review). The link also explains how to determine the uncertainty and there are a few examples.

3. Nov 16, 2015

### AstroKeith

That was extremely helpful. Thanks so much!

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