Il TEST DEL CHI QUADRO spiegato in modo semplice con una metafora!

In today's video, I'll explain what the chi-square test is and what it's used for. The chi-square test of independence is a nonparametric test used to determine whether there is an association, or dependence, between two categorical variables. The test's hypothesis system is as follows: H0 (null hypothesis): Variable 1 is independent of Variable 2 H1 (alternative hypothesis): Variable 1 is not independent of Variable 2 The value resulting from the chi-square calculation is a variable with a chi-square distribution with (r-1) * (c-1) degrees of freedom, where r and c are the number of rows and columns in the contingency table, respectively, that is, the number of modalities of the first variable and the number of modalities of the second variable. As an alternative to comparing the test and the critical value, you can also compare the p-value and the alpha significance level. The p-value is the probability of obtaining a specific set of observations if the null hypothesis were true - https://bit.ly/3wRBUi1 If you're wondering when to use the chi-square distribution, you can watch an intro to the chapter on qualitative variable associations in my SPSS video course. Intro to Qualitative Variable Association - https://bit.ly/3DRg5AQ While you're here, learn how to calculate one of the most common connection indices with my free lesson. Free Gamma Index Lesson - https://bit.ly/3uhvUxu Below are my other videos on the topic, covered in EXCEL: PHI Function - https://bit.ly/3Ln1AY4 CHISQ.DIST Function - https://bit.ly/3Kq9YG8 CHISQ.DIST.Right Function - https://bit.ly/3jfprg8 CHISQ.INV Function - https://bit.ly/3xqQ61Z CHISQ.INV.Right Function - https://bit.ly/37jwJN7 CHISQ.TEST Function - https://bit.ly/3r7GcOy You can find the full article on my blog https://adrianogilardone.com/test-del... Enjoy! ---------------------------------------------------------------------------- 📒📒 Sign up for my courses 📒📒 ►Statistics Courses - https://adrianogilardone.com/corso/st... ►Excel Courses - https://adrianogilardone.com/corso/ex... ►SPSS Courses - https://adrianogilardone.com/corso/spss/ -------------------------------------------------------------------------- 🌐🌐 Take advantage of the free materials I've prepared for you 🌐🌐 ►Free resources - https://adrianogilardone.com/risorse-... --------------------------------------------------------------------------- 📹📹 Don't miss these playlists 📹📹 ►STATISTICS: Lessons & Courses - https://bit.ly/41TF1DZ ►EXCEL: Course Lessons - https://bit.ly/429g0WF ►SPSS: Course Lessons - https://bit.ly/4iumNzE ►SHARP CALCULATOR - https://bit.ly/4kwjLNa ►STATISTICS: Statistical Metaphors - https://bit.ly/4iVn1jo ------------------------------------------------------------------------- 0:00 The Chi-Square Test: The Metaphor of Perception 0:17 The Metaphor of Perception 1:30 What is the Chi-Square Test? 1:42 Statistics and Dependence 2:37 Dependence and Independence 3:56 Percentage Distribution 5:08 Value