One Advantage to Writing a Single Model That Includes All $\sigma ^ { 2 }$

question 113

True/False

One advantage to writing a single model that includes all levels of a qualitative variable rather a separate model for each level is that we obtain a pooled estimate of $\sigma ^ { 2 }$ .

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Definitions:

Stratified Random Sampling

A sampling method that divides the population into smaller groups, or strata, and random samples are taken from each stratum.

Ethical Considerations

Refers to the moral principles and guidelines that should guide researchers to conduct studies responsibly and with respect for subjects' rights.

Sample Number

The count of individual units selected from a population to represent the whole, used in statistical analysis to draw conclusions about the larger group.

Convenience Sampling

A non-probability sampling method where participants are selected based on their easy availability and proximity to the researcher, which may limit the generalizability of the findings.