I know that you can use percentage error to compare the correct accepted value of one value with the average you got. But what formula would I use to compare a set of 6 results (3 from 2 people each) in terms of accuracy and precision?
2007-09-07 12:50:30 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
OH MY GOODNESS! EXCUSE MY GRAMMAR! I am so sorry for all the spelling errors. I am so stressed.
2007-09-07 12:51:22 · update #1
Do you mean comparing your two sets of 3 results to each other? If you have some accepted value to compare to, you can find the mean and standard deviation of each of your two sets of measurements. Whichever set has a mean closer to the accepted value is more accurate, and whichever set has less standard deviation is more precise.
For more advanced comparison, you could use a student's t test to compare your two sets, and seeing if they are significantly different.
2007-09-11 07:59:44 · answer #1 · answered by bagalagalaga 5 · 0⤊ 0⤋
Precision is how close the results are to the "right" answer, so you have to find an accepted value for the results of the experiment and work out the percentage errors.
Accuracy is how close the results were to each other, and for that you can calculate the mean and standard deviation.
2007-09-08 03:45:59 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋