A consumer agency wants to determine which of two laundry detergents, A or B, cleans better. Fifty 1-
square-foot sections of fabric are randomly selected
and cut from different bolts of fabric. They are then
subjected to the same kinds of stains (grass, mud,
coffee). Then 25 pieces are randomly assigned to be
cleaned with detergent A, and the remaining 25 pieces
are cleaned with detergent B. After being laundered,
the pieces of fabric are rated on a scale of 1-10, with
1 being the least clean to 10 being the most clean
The mean rating for detergent A is found to be
significantly greater than the mean rating for detergent
В. Which of the following is a valid conclusion
Inferences can be made about the population of
fabric from which the pieces were cut. The
conclusion can be made that detergent A cleans
better than detergent B for the fabric from these
bolts
Inferences cannot be made about the population of
fabric from which the pieces were cut. The
conclusion can be made that detergent A cleans
better than detergent B for the fabric from these
bolts
O Inferences can be made about the population of
fabric from which the pieces were cut. The
conclusion cannot be made that detergent A cleans
better than detergent B for the fabric from these
bolts