Question 45

Random errors are caused by unpredictable fluctuations in readings.

Random errors occur due to unpredictable variations in measurements that cannot be controlled or anticipated. These fluctuations can result from various factors, including environmental changes or inherent limitations of the measurement process.

A) Respondents favoring certain outcomes

This option refers to systematic errors, where respondents may consciously or unconsciously skew results towards preferred outcomes. While this can impact data quality, it does not align with the definition of random errors, which are characterized by their unpredictability.

B) Unpredictable fluctuations in readings

This option is correct as random errors are indeed caused by unpredictable fluctuations that arise during the measurement process. These errors are typically random in nature and can occur due to various uncontrollable factors, making them a key concern in data collection.

C) Biased data

Biased data results from systematic errors where certain outcomes are favored over others, leading to skewed results. This does not represent random errors, as bias implies a predictable deviation from true values, contrasting with the nature of random fluctuations.

D) An instrument that needs calibration

While a miscalibrated instrument can introduce systematic errors, it does not account for random errors. Random errors are not necessarily tied to the calibration state of an instrument but rather to the inherent variability in measurements.

Conclusion

Random errors are fundamentally linked to unpredictable fluctuations in readings, which distinguishes them from systematic errors caused by bias or instrument calibration issues. Options A, C, and D fail to address the essence of random errors, reinforcing that B is the only choice that accurately captures the nature of these errors in measurement contexts.