Answer:
In a census, data about all individual units (e.g. people or households) are collected in the population. In a survey, data are only collected for a sub-part of the population; this part is called a sample. These data are then used to estimate the characteristics of the whole population.
Explanation:
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I only know it's a process of change of matter but I don't remember the exact types
Yes it is. That is correct.
