1. A survey was recently conducted for a store called Pets, Pets, & Pets (PPP). This store has a list of 10,000 customers who have made a purchase there in the last year, and a random 400 of these customers participated in the survey. Following are some of the relevant findings. Please perform appropriate differences tests (95% level of confidence) to answer the questions: Do PPP dog owners differ from PPP cat owners with respect to their answers in the following table? If so, how do they differ (what interpretation can you make?)?

Table 1. PPP Survey Table

	Dog Owner	Cat Owner
Do you use PPP quite often?	50%	38%
Would you recommend PPP to a friend?	91%	75%