Master Statistics Essentials with 214 free flashcards. Study using spaced repetition and focus mode for effective learning in Mathematics.
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What is a population in statistics?
The entire set of individuals, items, or measurements that share a common property and are the subject of a statistical study.
Q · 1 of 214
What is a population in statistics?
Q · 2 of 214
What is a sample?
Q · 3 of 214
Why do we use samples instead of populations?
The entire set of individuals, items, or measurements that share a common property and are the subject of a statistical study.
A subset of a population selected to represent it for analysis.
Because measuring the entire population is often impractical, costly, or impossible.
A numerical value that describes a characteristic of a population (e.g., μ for mean, σ for standard deviation).
A numerical value that describes a characteristic of a sample (e.g., x̄, s).
Methods for summarizing and describing the main features of a dataset.
Methods for drawing conclusions about a population from sample data.
The arithmetic average: the sum of values divided by the number of values.
The middle value of an ordered dataset; if even count, the average of the two middle values.
The value or values that occur most frequently in a dataset.
When the data are skewed or contain outliers, because the median is more robust.
The difference between the maximum and minimum values in a dataset.
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