21. The primary data are collected by
22. The number of observations falling within a Class is called
23. The National Population Policy (NPP) 2000 set long term objective of achieving a stable population by
24. The mode of presentation of data are
25. The long run, as economists use the phrase, is characterized by
26. The law of Returns to scale applies to
27. The first industrial revolution laid the foundation of
28. The entire upper part of the table is known as
29. The data collected on the height of group of students after recording their heights with a measuring tape are
30. The best method to collect the data in case of natural Calamity, is
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