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Difference between interpolation and extrapolation?
Interpolation is filling in the data points between the data that has already been collected. Extrapolation is filling in data points beyond the data that has already been collected, or extending the data.
Distinguish between primary data and secondary data?
The difference is rimary data is information personally or originally collected that has not been studied. Secondary data is information already collected, examined and concluded.
Differences between primary data and secondary data?
Primary data is data that is collected by the researcher. Secondary data is information that has been collected by someone other than the user.
What is secondary data used for?
Secondary data has already been collected by and readily available from other sources. It is cheaper and easier to obtain than primary data. It helps provide an understanding of the problem and allows for comparison of the primary data collected. Secondary data can also be used as study to determine if and where mistakes or deficiencies exist in either set of data.
What is primary data in statistics?
Primary data is is data that has been observed or collected first hand
