Question

Trey is estimating the length of a room in his house. The actual length of the room is 17 m. Trey's estimate is 15 m.

Find the absolute error and the percent error of Trey's estimate. If necessary, round your answers to the nearest tenth.

Answer 1

2m and 11.8%

Explanation:

Absolute error is defined mathematically as;

Error/original value

[Original value - estimated value]

[17-15 ] = 2m

The percentage error would be

[Original value - estimated value]/ original value

[17-15 ] /17 × 100%

0.1176 × 100% = 11.76%

11.8%[ to the nearest tenth]

Answer 2

Absolute error = 2m

Explanation:

Absolute Error = Measured Value - Actual Value

17m - 15m = 2m