Question: A fixed-fixed beam is configured in a test setup in order to find out the principal strains using Rosetta strain gauges. 91 results are obtained

A fixed-fixed beam is configured in a test setup in order to find out the principal strains using Rosetta strain gauges. 91 results are obtained under fixed test conditions yielding an average strain of E = 1040. A precision uncertainty pf P_e = 42 at 95% confidence level is found using the statistical analysis of the test data. The bias uncertainty is estimated to be B_e = 58 at 95% confidence level.

Find out the true strain at 95% confidence level.

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