Examlex
The mass number for an element is composed of which of the following?
Simple Random Sampling
A sampling method where every member of a population has an equal chance of being selected.
Probability Sampling
A sampling method in which every member of the population has a known, non-zero chance of being selected, leading to representative and unbiased samples.
Quota Sampling
A sampling method where the sample is chosen to reflect the characteristics of the whole population in certain proportions.
Percentage Points
Percentage points represent the absolute difference between percentages, clarifying changes in percentage rates rather than relative changes.
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