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Two-sample t-test
ByDavis
Definition of Two-sample t-test Two-sample t-test: A two-sample t-test is a statistical hypothesis test used to determine whether the means of two samples are statistically different from each other. The test statistic is a t statistic, which is the ratio of the differences between the means of the two samples to the standard error of…
SPSS
ByDavis
Definition of SPSS SPSS (Statistical Package for the Social Sciences) is a software package used for statistical analysis. It was originally designed for social scientists, but has been expanded to accommodate a wider range of data. SPSS can be used to conduct basic statistical analyses, as well as more complex procedures such as multivariate analysis…
Scientific Notation
ByDavis
Definition of Scientific Notation Scientific Notation: Scientific notation is a way of representing very large or very small numbers. In scientific notation, a number is written as a product of two factors: a coefficient and a power of 10. The coefficient is a number between 1 and 10 that multiplies the power of 10. The…
Bayesian Network
ByDavis
A Bayesian network, also called a belief network, is a probabilistic graphical model that represents a set of random variables and their conditional dependencies. Variables are represented as nodes in the…
Latent Class Analysis
ByDavis
Definition of Latent Class Analysis Latent Class Analysis: A technique used to identify unobserved (latent) classes within a population. How is a Latent Class Analysis used? Latent Class Analysis (LCA) is a statistical technique used to identify latent classes within data sets. These latent classes are clusters of data points with similar characteristics, which can…
Strata, Stratified Sampling
ByDavis
Definition of Strata, Stratified Sampling Stratified sampling is a type of probability sampling in which the population is divided into strata and a simple random sample is taken from each stratum. This type of sampling is used when the population is heterogeneous and the researcher wants to ensure that all strata are represented in the…