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How do we account for multiple sources of uncertainty in a measurement?
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[QUOTE="fdegregorio, post: 6411764, member: 682125"] I'm an adult physics student and am just now learning probability so everything looks like a probability, question. Especially because you used the word "uncertainty". Could 30 degrees +- 0.5 degrees on a well-calibrated thermometer mean 30 degrees +-2* sd=2*0.25 degrees? So that, with a confidence interval of alpha = 0.05 or 95% of the time the measurement 30 will be within 29.5 to 30.5? Too deep for me. I'm sure I'm getting things wrong here. In real life, they tell you which calibrator to see that your thermometer isn't getting damaged. There is a specified time period, I think once a year when you have to recalibrate your thermometers. Then, you measure your thermometer at the last little hash mark carved into the side and trust your eyes. If it's closer to 30 than 29 or 31. It's said to be 30. , in practice, lab professionals who use their results treating patients just say 30 . Doctors say 98.6 . [/QUOTE]
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How do we account for multiple sources of uncertainty in a measurement?
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