- #1
rcummings89
- 19
- 0
Say I have a 0-10 lbf load cell that can measure the force it takes to lift an object. The load cell is accurate to 1% of the full scale. I take 5 measurements and get the following readings:
5.2, 5.1, 4.9, 5.0, & 4.8, all in lbf.
Now I am asked to give the mean with the associated uncertainty. The mean is going to be 5 lbf with a standard deviation of 0.16 lbf. Am I correct to say that the total uncertainty is going to be:
u = √((10 lbf * 0.01)2 + (0.16)2) = 1.01 lbf ?
In addition, I think I am missing a step because of the small sample size. Any help is appreciated in advance.
5.2, 5.1, 4.9, 5.0, & 4.8, all in lbf.
Now I am asked to give the mean with the associated uncertainty. The mean is going to be 5 lbf with a standard deviation of 0.16 lbf. Am I correct to say that the total uncertainty is going to be:
u = √((10 lbf * 0.01)2 + (0.16)2) = 1.01 lbf ?
In addition, I think I am missing a step because of the small sample size. Any help is appreciated in advance.