Students will demonstrate how accuracy and precision are used in science. Accuracy and Precision Lab Resource: CPO book p. 20 1. Students will do three trials of measuring a parent (s) or guardian and record it on a table. Trial 1 Trial 2 Trial 3 Average Parent 1 Parent 2 2. Show work for average : Show work for obtaining an average for each parent or guardian. 3. Student will record the parent’s height as noted on his or her state ID: 4. Students will convert the two measurements: The averaged and the one from the state ID, from feet-inches to feet. Show the operations for both. Example: If you have inches, convert it to feet. 1 foot and 6 inches is 1.5 ft. (6/12=.5; any inch over 12 will convert to feet). Show work for conversion to feet 5. Determine the percent error: Take the actual l height; then times 100 will give you the percent error. If you have a negative value, use the absolute value. % Error = ID actual H. – measured H x 100 show work:

ID actual H.

6. What did you do to show precision?

7. What did you do to show accuracy?