An instrument has been used to measure the length of a pair. The result was 2.638 inches. An error of measurement study was made on the instrument with the following results:
Accuracy: +0.001 inch (on the average, the instrument reads 0.001 inch high)
Precision: 0.0001 inch (1 standard deviation)

Make a statement concerning the true value of the part just measured. State all assumptions needed.