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statistical model

7 Practical Guidelines for Accurate Statistical Model Building

Model  Building–choosing predictors–is one of those skills in statistics that is difficult to teach.   It’s hard to lay out the ...

Statistical analysis

Statistical Analysis

What is statistical analysis? It might sound pretty naïve, to many, to ask this question. In his introduction to ‘Statistical Analysis...

p-value image

The “Big Five” Misinterpretations of Statistical Significance

NOTE TO READERS: The following has been excerpted from Principles and Practice of Structural Equation Modeling (Third Edition) by Rex B...

t-test

The significance of the t-distribution and the t-test

The fact that the normal distribution is one of the pivotal statistical distributions is virtually not subject to debate. Many statistica...

ANOVA

One-way Analysis of Variance, ANOVA

Analysis of Variance (ANOVA) is a statistical method used to test differences between two or more means. ANOVA is used to test general, o...

Big data

Is big data still big news

People talk about ‘data being the new oil’, a natural resource that companies need to exploit and refine. But is this really ...

Probability and Statistics

Probability and statistics

Probability and statistics are closely related and each depends on the other in a number of different ways. These have been tradi...

Statistical hypothesis testing

Statistical hypothesis testing

The term hypothesis testing is probably not new to you. The term significance testing is sometimes used. A statistical hypothesis is an a...

Big data analytics

Big data analysis and analytics

First, it is important to define the term big data and differentiate between data analysis and data analytics. Big data refers to data...

Multiple imputation of missing data

Imputation methods for missing data in longitudinal studies

Having complete data that one sought to record infrequently happens, especially in a study setting where repeated measures from subjects ...