Which of the following is NOT a direct method of collecting primary data?

Which of the following represents a source of published secondary data?

Which of the following is a source of secondary unpublished data?

Which of the following is a primary data source?

Data directly collected first-hand through field work is known as:

The use of multiple methods of data collection in the same research study is known as:

The original and first-hand data collected directly by the researcher for a specific study is known as:

Which one of the following is not a source of primary data collection?

In which type of observation does the researcher employ explicitly formulated rules for observing and recording behavior?