How to Interpret probability Value (P-value)

This video explains how to interpret probability Value, also kow an p-value NB: This video has been embeded under the persmission of Ron QS (Owner & Producer – Quantitative Specialists)

Understanding Full Mediation and Partial Mediation

In this article, I comrehensively explain the differences between Understanding Full Mediation and Partial Mediation There has been a great deal of confusion regarding statistical terms like mediation, moderation, interaction, confounding,  synergy effect, intervening variable, control variable, co-variate etc. In this series of articles, I’ll briefly describe each of these term by providing suitable examples. […]

HOW TO STATA COMMAND FOR TIME SERIES ANALYSIS

STATA COMMAND FOR TIME SERIES ANALYSIS How to set time series data: tsset  year, yearly How to fill missing data for Time Series analysis: ipolate x time, gen(xi) epolate How to check unit root using Augmented Dikker Fuller test (ADF): ADF unit root test using constant dfuller  x ADF test for constant and trend: dfuller […]

Understanding Type I and Type II errors

Type I and Type II errors signify the erroneous outcomes of statistical hypothesis tests. Type I error represents the incorrect rejection of a valid null hypothesis whereas Type II error represents the incorrect retention of an invalid null hypothesis. Null Hypothesis Null Hypothesis refers to a statement which nullifies the contrary with evidence. Consider the […]

Types of sampling design in Research Methodology

There are different types of sampling designs based on two factors viz., the representation basis and the element selection technique. On the representation basis, the sample may be probability sampling or it may be non-probability sampling. Probability sampling is based on the concept of random selection, whereas non-probability sampling is ‘non-random’ sampling. On element selection […]

Introduction to Mediation Analysis

Introduction to Mediation Analysis This post intends to introduce the basics of mediation analysis and does not explain statistical details. For details, please refer to the articles at the end of this post. What is mediation? Let’s say previous studies have suggested that higher grades predict higher happiness: X (grades) → Y (happiness). (This research […]

Linear regression using Minitab

Linear regression using Minitab Introduction Linear regression, also known as simple linear regression or bivariate linear regression, is used when we want to predict the value of a dependent variable based on the value of an independent variable. The dependent variable can also be referred to as the outcome, target or criterion variable, whilst the […]