I need help on how to work out uncertianity is there a set equation for it?(adsbygoogle = window.adsbygoogle || []).push({});

i found this on the web

Step 1:

Add up all your values and divide by the number of values

Step 2:

Subtract each value from this average value and take the absolute value from this (positive numbers)

Step 3:

Add up all these absolute values and divide by the number of values

Step 4:

Take this value and divide by the square root of the number of values you have

This 4 step process gives you the uncertainty of the data you have collected

is this correct?

1) when measuring wire i got the resualts of

0.28mm

0.28mm

0.28mm

0.29mm

0.29mm

0.29mm

0.28mm

0.29mm

The actual width of the wire said on the roll was 0.28mm and theses were taken with a electronic vernier scale which measures to 2dp of a mm. (if this is of any use)

i also read that if the uncertainity is below what the equipment can measure it is neglecable. And i also need to know how to turn it into a percentage

thanks in advanced

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding percentage uncertaintys

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**