Measurement accuracy refers to how close a measured value is to the true or actual value. For example, if a scale shows a weight of 150 pounds when the true weight is 150 pounds, the measurement is considered accurate. Accuracy is crucial in various fields, including science, engineering, and medicine, where precise measurements can significantly impact outcomes. Factors affecting measurement accuracy include the quality of the measuring instrument, environmental conditions, and the skill of the person taking the measurement. For instance, a calibrated thermometer will provide more accurate temperature readings than an uncalibrated one. Ensuring accuracy is essential for reliable data and informed decision-making.