Primary empirical.
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It is simply a data set.
There are several ways that data can be collected that include interviews and research. Other methods used to collect data include surveys, phone calls, and by direct observation.
It is the mean average of number of collected data values.
primary and secondary data in math termsprimary data meansinformation collected by your selfsecondary data in math termsdata collected not from your self but anInternet or a book.some thing you didn't collect your selfits not a raw piece of evidence
Information obtained from experiments. (information collected from an experiment)