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Parameter (Noun)

A quantity (such as the mean or variance) that characterizes a statistical population and that can be estimated by calculations from sample data.

Nouns denoting cognitive processes and contents.

The population mean is an important parameter in statistics that is often estimated from a random sample of data.
Researchers estimated the population variance as a parameter to help them understand the dispersion of the data set.
The sample standard deviation is used as an estimator of the population standard deviation, which is a key parameter in statistical inference.
To determine the reliability of the study, the researchers calculated the population size as one of the key parameters.
The parameter of interest was the population proportion, which the researchers attempted to estimate from the sample proportion of survey respondents.

A constant in the equation of a curve that can be varied to yield a family of similar curves.

Nouns denoting cognitive processes and contents.

In the equation of a circle, the radius is a parameter that determines the size of the circle.
The parameter c in the equation y = mx + c represents the y-intercept of a line.
The curve of an exponential function has a growth rate parameter that controls the rate at which the curve increases.
The ellipse equation has two parameters, a and b, that describe the lengths of the semi-axes.
The parameter k in the equation y = k/x is a constant that determines the shape of a hyperbola.