when to use each stats test

Question 1

looking for association, not comparing frequencies

Answer 1

spearman’s rank:
strength of correlation
and direction of a relationship between 2 variables

Question 2

not looking for association but comparing frequencies

Answer 2

chi squared: whether observed data differs from expected data

Question 3

not looking for association or COMPARING FREQUENCIES

Answer 3

students t-test: whether the difference between the means of 2 groups is statistically significant or not

Question 4

chi squared deeper

Answer 4

-categoric data
-expected frequency is always the average, e.g there is no effect on distribution