Question

Okay I'm doing a lab report, and I need to find the average of two trials. Can someone show me step-by-step how do find the uncertainty for this average:

(4.32g+4.17g)/2
=4.25

The values I used and their uncertainties:
4.32g +/- 0.02
4.17g +/- 0.02

Dec 2, 2010

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