Useful tips for everyday
What does it mean to control for age? “Controlling” for a variable means adding it to the model so its effect on your outcome variable(s)…
Is logistic regression A study design? Logistic regression is a statistical technique used in research designs that call for analyzing the relationship of an outcome…
Is z-score of 2 Extreme? Remember, z = 0 is in the center (at the mean), and the extreme tails correspond to z-scores of approximately…
Does LDA work with categorical variables? LDA works on continuous variables. If the classification task includes categorical variables, the equivalent technique is called the discriminant…
Is Mann Whitney test two tailed? The Mann-Whitney U test null hypothesis (H0) stipulates that the two groups come from the same population. (two-tailed test)…
How do you get rid of Heteroscedasticity? Weighted regression The idea is to give small weights to observations associated with higher variances to shrink their…
Is factor analysis a type of SEM? First Steps in Structural Equation Modeling: Confirmatory Factor Analysis. Confirmatory factor analysis (CFA) is the fundamental first step…
How do you handle missing data in Anova? One of the most effective ways of dealing with missing data is multiple imputation (MI). Using MI,…
What is p-chart in quality control? In statistical quality control, the p-chart is a type of control chart used to monitor the proportion of nonconforming…
What is a true null hypothesis? A null hypothesis is a type of hypothesis used in statistics that proposes that there is no difference between…