1.1.1 Precision and Accuracy
Precision is more important in calculatioNIS The precision of a measuring tool is related to the chapter size of its mcision more important in calculations. The predisitue in a calculation, the more precise is precise our housement increments. When using a me there aurenitent in person de the measuring instrument.
Accuracy refers to how closely a measured value agrees with its true value. Accuracy describes the difference te refers to how closely a measured value atual value. Thus it refers the mealsea inseasurement is to the the measured values and pends upon the least count of the measuring sup instrument, which becom correct value the accurance the result is written. This is important because low quality equipment, poor dear by the ning can lead to inaccurate results that are not very close to the true value .
Different cases of precession and accuracy in terms of plot of a set of data are shown in Fig. 1.1. We know if meat cases of precession and accuracy in tenen it is precise measurement and if measured values are close to red values are close to each other, theement. In Fig. 1.18, the measured values are neither agrees to mean value orentiate is close to true value. It displays the measurement is neither precise nor accurate. In Fig. 1.Ib, the measured values are not close to mean value but the mean value is close to true value. In the measurement is accurate but less precise. It is clear that precision is independent of accuracy. Likewise, in Fig. 1.1c, the measured values are close to mean value but the mean value is different for Likewise it shows the measurement is precise but not accurate. Fig. 1.1d, the measured values are in agreement with the mean value and the mean value is also close to true value.
In scientific studies precision is important in order to confirm we are getting the correct results. Since we use some models or samples to represent something much bigger; small errors may be magnified into large errors during the experiment. The common way to improve the accuracy of a measurement is to control all other variables as much as possible.