8 posts • Page 1 of 1
Hi, I was just wondering, how would we know whether our experiment is accurate of precise? There are so many ways an experiment can no be accurate but I don't understand how precision would be helpful in this situation. Any help to understanding this would be appreciated.
Often in labs you can know how accurate your results are by comparing the experimental values to theoretical ones, and how precise they are by repeating the same experiment multiple times and comparing the results to one another.
With a lab experiment, when your results are close to the actual answer they can be described as accurate. If you do the lab multiple times and your results for each test are close together then the results can be defined as precise. If lab results are precise but not accurate, it could mean some part of the lab has a fundamental error that should be fixed.
To further understand the difference between accuracy and precision, you can refer to the example of the dartboard that Dr. Lavelle presented in class. The dartboard that showcased precision had all of the darts clustered around one area of the board, not necessarily on the bull's-eye. However, the dartboard that showcased accuracy had darts that were close to the bull's-eye. Thus, from this we can comprehend that precision deals with the closeness of the measurements to each other and accuracy deals with the closeness to the true value.
In labs that I have done in the past, I have had trouble mitigating and solving errors. I was wondering if anyone has any advice on how to identify sources of error in a controlled experiment and how to suggest mitigation. I know that it is unwise to attribute anything to human error, so I was hoping for some advice on remedying technical errors and how to articulate this in a lab report.
Who is online
Users browsing this forum: No registered users and 3 guests