Reference data is used when applying for a job. The company needs to see if you are a good worker so they will call your past bosses to ask for references.
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Mathematics used in collecting data because factors of numbers would be operated.
There are a variety of methods used for collecting data. These include registration, questionnaires, interviews, direct observations, as well as reporting.
It is statistics
The most widely used technique in collecting data for job analysis is _________.the interviewobservationthe ncumbentirethe incumbent diary