You are the owner of a pawnshop. Each day you sell a number of items. At the end of the day you wish to know what your net profits are during the day. The gross profit is computed as the difference between the selling price and the price you paidfor the item. To calculate the net profit you subtract 6% of the gross profit for tax and subtract 10% of the gross profit for overhead. The resulting value is the net profit.

Penny poodle wanted to know which dog obedience training program was more effective: puppy pride, the approach she has been using for any years, or doggie do-right, a new approach. penny convinced 50 human companions of untrained dogs to participate in her study. the dogs and their humans were randomly assigned to complete the puppy pride or doggie do-right course. at the end of the training programs, all of the dogs were scored on their level of obedience on a standardized dog obedience checklist (scores could range from 10 to 100). the design of this study is: