USPS - Error Detection Test Error Detection Identifying Data Entry Errors 1 — Questions and Answers
Question 1: A postal clerk enters a customer's PO Box number as 'PO Box 1892' in the system, but the handwritten application form clearly reads 'PO Box 1982.' What type of error has occurred?
- Omission error — a digit was left out
- Transposition error — adjacent digits were swapped (Correct answer)
- Substitution error — the wrong digit was entered
- Duplication error — a digit was repeated
Correct answer: Transposition error — adjacent digits were swapped
The digits '8' and '9' have been swapped (1892 vs. 1982), which is the definition of a transposition error. The total number of characters is the same, but two adjacent digits are reversed.
Question 2: A Priority Mail Express label is printed with the recipient's ZIP code as '30318' but the delivery confirmation record in the system shows '30381.' The city and state are identical on both documents. What is the most likely error?
- The state abbreviation was entered on the wrong line
- A transposition error swapped the last three digits (Correct answer)
- The ZIP code belongs to a different city entirely
- The clerk selected the wrong mail class
Correct answer: A transposition error swapped the last three digits
Comparing '30318' with '30381' reveals that the digits '1' and '8' have been transposed in the final positions. The city and state match, confirming this is a digit-swap data entry error, not a geographic mismatch.
Question 3: A change-of-address form is keyed into the system as 'Margaret L. Thornton' but the customer's signature block reads 'Margaret L. Thornington.' What category of error does this represent?
- Omission error — letters are missing from the entered name (Correct answer)
- Transposition error — letters are in the wrong order
- Substitution error — one name was replaced with another
- Format error — the middle initial was placed incorrectly
Correct answer: Omission error — letters are missing from the entered name
'Thornton' is missing the letters 'ing' that appear in 'Thornington.' Characters were dropped during entry, making this an omission error.
Question 4: A bulk mail entry shows a postage amount of '$142.70' while the physical postage meter tape attached to the batch reads '$142.07.' What data entry error is present?
- The decimal point was placed in the wrong position
- The digits '7' and '0' were transposed in the cents column (Correct answer)
- A digit was added, inflating the total
- The dollars and cents amounts were switched
Correct answer: The digits '7' and '0' were transposed in the cents column
'$142.70' versus '$142.07' shows that the '7' and '0' in the cents position have been reversed. This is a transposition error affecting the monetary value recorded.
Question 5: A carrier's scan log records a package as delivered to '88 Pinecrest Drive' at 14:32, but the route manifest lists the address as '88 Pinecrest Drive' with a delivery window note of '14:23.' What discrepancy exists?
- The street address was entered incorrectly
- The time digits were transposed, reversing minutes (Correct answer)
- The package was logged under the wrong carrier ID
- The delivery date is missing from the scan log
Correct answer: The time digits were transposed, reversing minutes
14:32 vs. 14:23 shows the digits '3' and '2' in the minutes field have been swapped. The street address is identical on both documents, so the only error is the transposed time entry.
Question 6: A retail unit's end-of-day report lists money order serial number '2209-4471' but the physical money order stub in the drawer shows serial number '2290-4471.' What error occurred during data entry?
- A digit group was omitted from the serial number
- The hyphen separator was placed at the wrong position
- Two digits within the first group were transposed (Correct answer)
- The entire serial number was entered for the wrong transaction
Correct answer: Two digits within the first group were transposed
In the first four-digit group, '2209' versus '2290' shows that the '0' and '9' have been swapped. This is a transposition error confined to the first segment of the serial number.
USPS - Error Detection Test Error Detection Identifying Data Entry Errors 1
A postal clerk enters a customer's PO Box number as 'PO Box 1892' in the system, but the handwritten application form clearly reads 'PO Box 1982.' What type of error has occurred?