Robert measured a line to be 2.4 inches long. If the actual length of the line is 3.2 inches, then what was the percent error of the measurement, to the nearest tenth of a percent?Answer: _________%
Q. Robert measured a line to be 2.4 inches long. If the actual length of the line is 3.2 inches, then what was the percent error of the measurement, to the nearest tenth of a percent?Answer: _________%
Understand percent error: Understand the concept of percent error. Percent error is a measure of how inaccurate a measurement is, relative to the true value. The formula for percent error is: Percent Error = (∣Measured Value−True Value∣/True Value)×100%
Identify values: Identify the measured value and the true value.In this problem, the measured value is 2.4 inches, and the true value is 3.2 inches.
Calculate absolute difference: Calculate the absolute difference between the measured value and the true value.Absolute difference = ∣Measured Value−True Value∣ = ∣2.4−3.2∣ = ∣−0.8∣ = 0.8 inches
Calculate percent error: Calculate the percent error using the formula.Percent Error = (Absolute difference/True Value)×100%Percent Error = (0.8/3.2)×100%
Perform division and multiplication: Perform the division and multiplication to find the percent error.Percent Error = (0.8/3.2)×100%=0.25×100%=25%
Round percent error: Round the percent error to the nearest tenth of a percent. Since the percent error is already at a whole number, rounding to the nearest tenth of a percent does not change the value.