The productivity of manufacturing plant workers is compared before and after the installation of air conditioning. The samples
A)are dependent
B)are independent
C)follow a normal distribution
D)are not a type that can be determined

Question

Quizplus · Accepted Answer

The samples are dependent because the productivity of the same group of workers is measured before and after the installation of air conditioning, implying a comparison within the same group over two different conditions.

The Productivity of Manufacturing Plant Workers Is Compared Before and After