Four lab workers weigh the same 50.0 g standard mass five times. Who did the best job?
How to use
Pick a worker. Press Weigh it five times to see each reading.
Type the average (one decimal place) and the percent error.
Pick the label that fits the readings. Read the feedback.
Try Free play to change bias and scatter yourself. Then press Show my results.
Steps done: 0 of 12First-try correct: 0
What do accurate and precise mean?
Accurate means close to the true (accepted) value. Precise means the readings are close to each other. In this lab we say a worker is accurate if the percent error is under 1 %, and precise if the range is 1.0 g or less.
Number line (grams)
Bullseye: distance from 50.0 g
Number line (grams)
Bullseye: distance from 50.0 g
Free play does not change your score. Same set number means the same random draw, so you can see what bias and scatter do on their own.