Key Word
VARY
Statistical questions expect answers that differ across observations.
Key Word
P → P
Population → Parameter. Both start with P. Whole group = parameter.
Key Word
S → S
Sample → Statistic. Both start with S. Subset = statistic.
Key Word
LABEL vs NUMBER
Label/group = Categorical. Measurable number = Quantitative.
Key Word
SUBSET
A sample is always a smaller part (subset) of the population.
Key Word
PROPORTION
Categorical data → proportions. Quantitative data → mean / median.