Ratio data

One group

Large sample

Population mean

Don't know sigma

1-sample z-test  / # 2

Ratio data

Two groups

Large sample

Population variances

Populations are normally distributed

F-test / # 15

Nominal data

Two factors of classification

Large sample

Test for independence

Expected frequencies condition met

Chi-Square / # 18

Ratio data

One group

Small sample

Population mean

Don't know sigma

Population is normally distributed.

1-sample t-test / # 11

Ratio data

One group

Small sample

Population mean

Don't know sigma

Population is  NOT normally distributed

Mann-Whitney  /  # 19