Four students use the centimeter ruler shown to measure an object during an investigation. Each student aligns the edge of the o
bject with the left edge of the ruler as shown above. All four students read the ruler with a measurement of 4.6 cm. Which statement describes the data they collect? The data have high precision but poor accuracy because of a systematic error. The data have high precision but poor accuracy because of a random error. The data have poor precision and poor accuracy because of a systematic error. The data have poor precision and poor accuracy because of a random error.
The data have high precision but poor accuracy because of a systematic error. Thus, the correct option is A.
<h3>What is systematic error?</h3>
An error that is not caused by chance, but rather by a system-wide inaccuracy (in terms of observation or measurement).
The accuracy of a value refers to how close it is to its genuine value. An arrow's proximity to the bull's-eye center is an example. A measurement's precision refers to how repeatable it is. A systematic error has occurred.
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If the medical assistant noted irregularities in the heart rate when palpating the radial pulse, they would opt to take a patients apical pulse for a full minute to make sure they are accurately counting the number of heartbeats per minute.
