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A good way to reduce error or increase measurement accuracy is to take several measurements and compute their average. In other words, you achieve accuracy through averaging. (This also validates the repeatability of the measurement.)

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Q: Why are several trials taken for each measurement in an experiment?
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What is an error in measurement?

A error in measurement is when the measurement taken is not actually correct. For instance, you measure a gap as 49 centimetres wide. You cut the plank of wood to fit that measurement. Then discover the wood you have just cut is too wide to neatly fit the gap. There has been an error in the measurement you have taken.


How many different ways can you measure a puddle?

You could measure a puddle in various ways, which might, assuming basic instruments of measure are used, include:circumference or perimeter (linear measurement)color (subjective observatory measurement)color at different times of day and in different weather conditions, and so on (subjective observatory measurement)depth (linear measurement)surface area (area measurement)temperature of contents (Celsius)temperature of contents (Fahrenheit)time taken to be drunk by a dog of a particular age, weight and breed (time measurement)time taken to empty (time measurement)time taken to evaporate under various temperature controls (time and temperature measurement)time taken to fill (time measurementvolume of contents (capacity/volume measurement)weight of contents (weight/mass measurement)


Where is the measurement taken from to get the depth for footings?

The measurement is taken from the point above grade at which height the foundation will be at completion, taking into account the type of foundation material and the frost line, and the depth of the crawl space or basement, if any.


Is transmittance a more accurate measurement?

Transmittance is a measurement of the amount of light that is able to pass through a material, and it can be used to accurately determine the amount of light that is transmitted. However, the accuracy of the measurement depends on factors such as the quality of the equipment used and the conditions under which the measurement is taken. Therefore, while transmittance can provide an accurate measurement, it is important to ensure that proper procedures and equipment are used to minimize errors.


What is more precise meter or decimetre?

Both are units of measure. Neither is more 'precise'. The precision is to do with the accuracy of the measurement taken and not by the units used.