Question

The standard mass of an unknown substance is 15.6g. Which of the following set has the least accurate value? show your solutions.

trial A B C

1 15.6 15.8 15.6

2 15.4 14.6 15.5

3 15.6 14.7 15.8

a. A b. B c. C d. D

Answer 1

$(15.6+15.8+15.6)/3=15.67\ (g)$

$(15.4+14.6+15.5)/3=15.17\ (g)$ $\sqrt{}$

$(15.6+14.7+15.8)/3=15.37\ (g)$

The second set has the least accurate.