Example Systematic Random 1.When weighing yourself on a scale , you position yourself slightly differently each time. 2.When taking a volume reading in a flask, you may read a value from a different angle each time. 3.Measuring the mass of a sample in an analytical balance may produce different values as water enters or leaves the specimen. 4.Measuring your height is affected by minor posture changes . 5.Measuring wind velocity depends on the height and time at which a measurement is taken. 6. Forgetting to tare or zero a balance produces a mass measurement that is always “off” by the same amount. 7.Measured distance is different using a new cloth measuring tape versus an older stretched one, 8.An improperly calibrated thermometer may give an accurate readings within a certain temperature range , but become inaccurate at higher or lower temperature. 9.Not reading in the eye meniscus levels or a volume measurement will always result in an unaccurate reading. 10.Measuring length [with a metal ruler will give a different result at a cold temperature than a hot temperature due to thermal expansion of metal.
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Example |
Systematic |
Random |
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1.When weighing yourself on a scale , you position yourself slightly differently each time. |
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2.When taking a volume reading in a flask, you may read a value from a different angle each time. |
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3.Measuring the mass of a sample in an analytical balance may produce different values as water enters or leaves the specimen. |
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4.Measuring your height is affected by minor posture changes . |
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5.Measuring wind velocity depends on the height and time at which a measurement is taken. |
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6. Forgetting to tare or zero a balance produces a mass measurement that is always “off” by the same amount. |
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7.Measured distance is different using a new cloth measuring tape versus an older stretched one, |
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| 8.An improperly calibrated thermometer may give an accurate readings within a certain temperature range , but become inaccurate at higher or lower temperature. | ||
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9.Not reading in the eye meniscus levels or a volume measurement will always result in an unaccurate reading. |
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10.Measuring length [with a metal ruler will give a different result at a cold temperature than a hot temperature due to thermal expansion of metal. |
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