The activity of measuring and explaining the size of populations is known as___________________?

A. it takes place outside the university campus
B. it makes use of covert research methods
C. it investigates working of society that are different from official accounts
D. the investigator is sympathetic to the activities that he is investigating

A. the s is clearly worded
B. they cover the return postage
C. the answers are mutually exclusive
D. they are easy and quick to answer
E. they involve no thought on the part of the respondent.

A. being as precise as possible in defining an initial hypothesis
B. holding some variables constant to look at the effects of others
C. supervising the data collection process as closely as possible
D. seeking to manipulate the outcomes of a research process