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2. ### Managed care - Wikipedia

en.wikipedia.org/wiki/Managed_care

An Independent Practice Association is a legal entity that contracts with a group of physicians to provide service to the HMO's members. Most often, the physicians are paid on a basis of capitation, which in this context means a set amount for each enrolled person assigned to that physician or group of physicians, whether or not that person seeks care.

3. ### Linear model - Wikipedia

en.wikipedia.org/wiki/Linear_model

In statistics, the term linear model is used in different ways according to the context. The most common occurrence is in connection with regression models and the term is often taken as synonymous with linear regression model.

4. ### Pivotal quantity - Wikipedia

en.wikipedia.org/wiki/Pivotal_quantity

In statistics, a pivotal quantity or pivot is a function of observations and unobservable parameters such that the function's probability distribution does not depend on the unknown parameters (including nuisance parameters).

5. ### Sampling distribution - Wikipedia

en.wikipedia.org/wiki/Sampling_distribution

In statistics, a sampling distribution or finite-sample distribution is the probability distribution of a given random-sample-based statistic.If an arbitrarily large number of samples, each involving multiple observations (data points), were separately used in order to compute one value of a statistic (such as, for example, the sample mean or sample variance) for each sample, then the sampling ...

6. ### Statistical parameter - Wikipedia

en.wikipedia.org/wiki/Statistical_parameter

In statistics, as opposed to its general use in mathematics, a parameter is any measured quantity of a statistical population that summarises or describes an aspect of the population, such as a mean or a standard deviation.

7. ### Z-test - Wikipedia

en.wikipedia.org/wiki/Z-test

Applicability. Because of the central limit theorem, many test statistics are approximately normally distributed for large samples.Therefore, many statistical tests can be conveniently performed as approximate Z-tests if the sample size is large or the population variance is known.

8. ### Polynomial regression - Wikipedia

en.wikipedia.org/wiki/Polynomial_regression

In statistics, polynomial regression is a form of regression analysis in which the relationship between the independent variable x and the dependent variable y is modelled as an nth degree polynomial in x. Polynomial regression fits a nonlinear relationship between the value of x and the corresponding conditional mean of y, denoted E(y |x).

9. ### Purchase funnel - Wikipedia

en.wikipedia.org/wiki/Purchase_funnel

Similar to a purchase funnel, "conversion funnel" is a technical term used in e-commerce operations to describe the track a consumer takes through an Internet advertising or search system, navigating an e-commerce website and finally converting to a sale.