Final answer:
In straight numeric filing, records are organized by an assigned unique identifier number, commonly known as the patient number in medical contexts. This method allows for efficient organization and quick retrieval of files.
Step-by-step explanation:
In straight numeric filing, records are filed in order of increasing number. Specifically, this means that the files are organized by a unique identifier number that has been assigned to each individual record or patient. This method of filing is often used in various settings, including medical and business contexts.
For example, option (d) Patient Number is the correct answer because in a medical setting, records are typically filed based on an assigned patient number rather than personal information such as a given name, surname, or birthdate. This numeric system enables quick retrieval and efficient organization of files.
In other contexts, such as research or schools, similar methods may be employed, like when a medical researcher might interview every third cancer patient (Sampling) or a counselor uses a computer to generate random numbers to select students (Random Selection).