BONUS
What is the drawback of the chi-squared GOF test?
You can never prove the null hypothesis, only fail to reject it
How many populations can be used in this test?
2+
What does it imply if the p-value is less than the significance level?
it implies there is sufficient evidence to conclude that the observed is different from the expected distribution
What is the purpose of the coefficient of determination (R²) in regression analysis?
quantifies how well the regression line fits the observed data
What is the degree of freedom for the inferences of regression?
n-2