In which of the following would the two samples be independe

In which of the following would the two samples be independent? (Pick all that apply)

Select one or more:

a. Sample 1: We record the income of 1000 randomly selected male voters from Wake County.
Sample 2: We record the income of 1000 randomly selected female voters from Wake County.

b. Sample 1: We record the height of 1000 randomly selected men with male children.
Sample 2: We record the height of the oldest male child of the individuals in sample 1.

c. Sample 1: We record the income in 2002 of 1000 randomly selected individuals.
Sample 2: We record the income in 2007 of the same individuals from Sample 1.

d. Sample 1: We record the income of 100 randomly selected school teachers in North Carolina.
Sample 2: We record the income of 75 randomly selected school teachers in California.

Solution

a Independent

b. Dependent.Second sample depends on first sample

c. Dependent. Data is collected on same individual.

d. Independent.