What step of the design process is this: “Used the test results to identify any modifications that they needed to make to improve their design. Once they identified these modifications, they returned to the previous steps of the process and made and tested these modifications.”

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)