What is the difference in the proportions (detergent minus plain water)? Express your answer as a decimal.
Mrs. Hampton’s class runs a computer simulation and determines the sample-to-sample variability of the difference between the proportion of food removed by the detergent compared to plain water. They conclude that the difference in the true proportion of food removed is
Is a difference of zero a plausible result considering their margin of error? What does a difference of zero mean in the context of this problem?
% difference indicates that there is ...
Are you convinced that there is a true difference between cleaning with detergent and cleaning with plain water?
Is a difference of
within the margin of error from part (b)?