uizjattempt.php?attempt 3019559 t Help a a Rita Brikh ral Chemistry Lab I #1-Acc

Question

uizjattempt.php?attempt 3019559 t Help a a Rita Brikh ral Chemistry Lab I #1-Accuracy & Precision Exp #1 Accuracy and Precision Pre-Lab Quiz Two students are asked to determine whether their unknown substance is nickel. The literature value for density of nickel is 8.80 g/mL. Each student determined the density of the substance five times with the folliowing results Student A: mean 8.762 g/mL, standard deviation 0.038 Student B: mean 8.951 g/ml, standard deviation 0.008 Which student's results are more precise and which more accurate? Select one: a. A less precise and more accurate b. A more precise and more accurate C. A less precise and less accurate d. A more precise and less accurate e. A less precise but insufficient data to judge accuracy Next page 8 9 0 5 6 0

Explanation / Answer

value of student A is more close to acutal value so A is more accurate

and student B has less standard deviation in his vales so B is more precise.

So answer is A is more accurate and B is more precise.

or we can say A is more accurate but less precise. (option b)

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