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Measurement Certainty: How Certain Are You?
| Content Provider | TeachEngineering: STEM curriculum for K-12 |
|---|---|
| Author | Cox, Ralph |
| Copyright Year | 2015 |
| Description | Students learn about the statistical analysis of measurements and error propagation, reviewing concepts of precision, accuracy and error types. Students work in teams to each measure the dimensions and mass of five identical cubes, compile the measurements into small data sets, calculate statistics including the mean and standard deviation of these measurements, and use the mean values of the measurements to calculate density of the cubes. Students learn about the statistical analysis of measurements and error propagation, reviewing concepts of precision, accuracy and error types. This is done through calculations related to the concept of density. Students work in teams to each measure the dimensions and mass of five identical cubes, compile the measurements into small data sets, calculate statistics including the mean and standard deviation of these measurements, and use the mean values of the measurements to calculate density of the cubes. Then they use this calculated density to determine the mass of a new object made of the same material. This is done by measuring the appropriate dimensions of the new object, calculating its volume, and then calculating its mass using the density value. Next, the mass of the new object is measured by each student group and the standard deviation of the measurements is calculated. Finally, students determine the accuracy of the calculated mass by comparing it to the measured mass, determining whether the difference in the measurements is more or less than the standard deviation. |
| Language | English |
| Access Restriction | Open |
| Rights Holder | Rice University Regents of The University of Colorado |
| Subject Keyword | Measurement Physics Reasoning and Proof Average Density Precision Systematic Error Calculated Data Mean Measured Data Random Error Uncertainties Measurements Standard Deviation Statistics |
| Content Type | Text |
| Time Required | PT2H15M |
| Education Level | Class VIII Class IX Class X Class XI Class XII |
| Pedagogy | Experimental Activity |
| Resource Type | Hands-on |
| Subject | Physics Geometry |
