Back to Choose appropriate accuracy — Problem 1 · Task Set 6

Exercises: Choose a Level of Accuracy Appropriate to Limitations on Measurement When Reporting Quantities

Work through each section in order. Show your work where indicated. Remember: the goal is to report the right number of digits, not the most digits.

Grade 9·22 problems·~40 min·Common Core Math - HS Number and Quantity·standard·hsn-q-a-3

Work through problems with immediate feedback

Recall / Warm-Up

A scale always reads 0.5 kg higher than the true weight. Five measurements of a 10.0 kg object give: 10.5, 10.5, 10.5, 10.5, 10.5. Which statement correctly describes these measurements?

Precise and accurate — the readings are consistent and correct.

Precise but inaccurate — the readings are perfectly consistent (range = 0) but systematically 0.5 kg above the true value.

Accurate but imprecise — the readings are close to the true value on average.

Neither precise nor accurate — the readings are all different.