📌 The population mean is denoted by μ and estimated by the sample mean x̄, while the population proportion is denoted by p and estimated by the sample proportion p̂.
A parameter describes the population, whereas a statistic describes the sample.
1. Which statement best defines a population parameter?
2. A researcher calculates the average income of 200 surveyed households. What does this calculated average represent?
3. Which pairing correctly matches population quantities with their sample estimates?
What is a population parameter?
A numerical descriptive measure of a population.
Why is a population parameter usually unknown?
Because it is based on all population observations.
What is a sample statistic?
A numerical descriptive measure calculated from sample observations.
What symbol denotes the population mean?
The population mean is denoted by μ.
What symbol denotes the sample mean?
The sample mean is denoted by x̄.
What symbol denotes the population proportion?
The population proportion is denoted by p.
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