Final answer:
Accuracy and precision are important concepts in measurement. The measurements in this case have poor accuracy but good precision.
Step-by-step explanation:
Accuracy and precision are two important concepts in measurement. Accuracy refers to how close a measurement is to the true or actual value. In this case, the measurements of the pencil length are not accurate because they are all lower than the actual length of 15.85 cm.
Precision, on the other hand, refers to how consistent and reproducible the measurements are. The measurements in this case are precise because they are all very close to each other, with only small variations in the recorded lengths.
Therefore, the measurements in this case have poor accuracy but good precision.