Reliability in statistics and psychometrics is the overall consistency of a measure It is the characteristic of a set of test scores that relates to the amount of random error from the measurement process that might be embedded in the scores.

Hypothesis testing is used to infer the result of a hypothesis performed on sample data from a larger population. The test tells the analyst whether or not his primary hypothesis is true. Statistical analysts test a hypothesis by measuring and examining a random sample of the population being analyzed.

A statistically significant test result is one in which a difference between two groups is unlikely to have occurred because the sample happened to be atypical.

Analysis of variance is a collection of statistical models and their associated estimation procedures used to analyze the differences among group means in a sample.

Data analysis is a process of inspecting, cleansing, transforming and modeling data with the. A data product is a computer application that takes data inputs and generates outputs, feeding them back into the environment.

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