When to use what test

Question 1

DV Categorical

Answer 1

Chi-squared

Question 2

DV numerical

Answer 2

all the rest

Question 3

IV categorical

Answer 3

1 variable - one-sample t-test (i guess??)
2 variables - independent samples t-test
3 variables - ANOVA

Question 4

IV numerical

Answer 4

same scale - paired-samples t-test
different scale - pearson’s r