What can we learn from the Penny Exercise

# What can we learn from the Penny Exercise - What can we...

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What can we learn from the Penny Exercise? Weighing a penny and reporting its weight tells us both about pennies and about students. The instruction in the lab  manual is: “… make one additional weighing, namely of a U.S. penny, on the analytical balance." An analysis of the data collected in some CHE 133 sections in Fall, 2002 follows. Many reported weights show  deficiencies: 1. Not all students follow instructions 332  out of a potential 500 students (66%) reported weights at all . 34% did not follow the instruction in the  manual. 2. Many students report the weight to fewer than 4 decimal places Of the 332 reports,  121  reported fewer than 4 decimal places (37%) o   11 reported 3 decimal places o    4 reported 1 decimal place o 106 reported 2 decimal places o 211 correctly reported 4 decimal places To what can we attribute the 121 defective reports? o

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## This note was uploaded on 09/23/2009 for the course CHE 81914-01 taught by Professor Prof.benjaminhsiao during the Fall '06 term at SUNY Stony Brook.

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What can we learn from the Penny Exercise - What can we...

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