Hailey measured a line to be 10.4 inches long. If the actual length of the line is 10.3 inches, then what was the percent error of the measurement, to the nearest tenth of a percent?Answer:_________ %
Q. Hailey measured a line to be 10.4 inches long. If the actual length of the line is 10.3 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, represented as a percentage of the actual value. The formula for percent error is:Percent Error = (∣Measured Value−Actual Value∣/Actual Value)×100
Identify values: Identify the measured value and the actual value.In this problem, the measured value is 10.4 inches, and the actual value is 10.3 inches.
Calculate absolute difference: Calculate the absolute difference between the measured value and the actual value.Absolute difference = ∣Measured Value−Actual Value∣=∣10.4 inches−10.3 inches∣=0.1 inches
Divide by actual value: Divide the absolute difference by the actual value.Divide 0.1 inches by 10.3 inches to get the error fraction.Error fraction = 10.3 inches0.1 inches≈0.00970873786407767
Convert to percent: Convert the error fraction to a percent.Multiply the error fraction by 100 to convert it to a percent.Percent Error = 0.00970873786407767×100≈0.970873786407767%
Round to nearest tenth: Round the percent error to the nearest tenth of a percent.Rounding 0.970873786407767% to the nearest tenth of a percent gives us 1.0%.