Samples of both surface soil and subsoil were taken from eight randomly selected agricultural locations. The soil samples were analysed to determine both surface pH and subsoil pH. Are the above two samples independent or paired? Explain why. Solution This is an example of a paired sample. This is because there may be a direct correlation to the pH of the surface pH to that of the subsoil pH..

1. Samples of both surface soil and subsoil were taken from eight randomly selected agricultural
locations. The soil samples were analysed to determine both surface pH and subsoil pH.
Are the above two samples independent or paired? Explain why.
Solution
This is an example of a paired sample. This is because there may be a direct
correlation to the pH of the surface pH to that of the subsoil pH.