Uploaded October 2021 | Updated September 2026, 10 hours ago
Cronbach's alpha (or tau-equivalent reliability) is a measure of the relationship between a group of questions. The group of questions is called a scale and each question in that group is an item. Cronbach's alpha is therefore a measure of the internal consistency of a scale and thus of the strength of its reliability.
More details about Cronbach's alpha
numiqo.com/tutorial/cronbachs-alpha
And the Cronbach's alpha calculator
numiqo.com/statistics-calculator/reliability-analysis/cronbachs-alpha-calculator
Cronbach's alpha (or tau-equivalent reliability) is a measure of the relationship between a group of questions. The group of questions is called a scale and each question in that group is an item. Cronbach's alpha is therefore a measure of the internal consistency of a scale and thus of the strength of its reliability.
More details about Cronbach's alpha
numiqo.com/tutorial/cronbachs-alpha
And the Cronbach's alpha calculator
numiqo.com/statistics-calculator/reliability-analysis/cronbachs-alpha-calculator
![Survival Analysis [Simply Explained]](https://i.ytimg.com/vi/Wo9RNcHM_bs/mqdefault.jpg "Survival Analysis [Simply Explained]
This video is all about survival time analysis. We start with the question what a survival time analysis is, then we come to the important point what the censoring of data means and finally we discuss the Kaplan Meier Curve, the log rank test and the Cox regression.
Survival time analysis is a group of statistical methods in which the variable under study is the time until an event occurs.
Survival Time Analysis Calculator
https://numiqo.com/statistics-calculator/survival-analysis
All Videos:
Survival Analysis Basics: https://youtu.be/Wo9RNcHM_bs
Kaplan-Meier-Curve: https://youtu.be/L_ziqYhksG8
Log-Rank Test: https://youtu.be/FhUkDRzHdHE
Cox Regression: https://youtu.be/DpZoRqqDgXA")
![Spearman Rank Correlation [Simply explained]](https://i.ytimg.com/vi/XV_W1w4Nwoc/mqdefault.jpg "Spearman Rank Correlation [Simply explained]
Spearman rank correlation examines the relationship between two variables. The Spearman rank correlation is the non-parametric counterpart of the Pearson correlation. There is an important difference between the two correlation coefficients! The Spearman correlation does not use the initial data, but the ranks of the data.
► Online Spearman Correlation Calculator
https://numiqo.com/statistics-calculator/correlation/spearman-correlation-calculator
► Sample data
https://numiqo.com/statistics-calculator/correlation/spearman-correlation-calculator?example=spearman_correlation
► Tutorial Spearman Correlation
https://numiqo.com/tutorial/spearman-correlation
► E-BOOK
hhttps://numiqo.com/statistics-book
00:00 What is a Spearman rank correlation?
00:08 Spearman correlation VS Pearson correlation coefficient.
00:29 Spearman rank correlation example.
02:39 Equation Spearman rank correlation coefficient
03:25 Spearman correlation coefficient interpretation
04:14 Spearman correlation test for significance
04:30 Null hypothesis and alternative hypothesis
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