Yes. There are more than 30 measurements. Yes. It is not true that both np210 and nilp)210. Yes. It is true that both np210 and n(1p)210. No. It takes a lot more than 500 people to accurately represent all the shoppers. No. It is true that both np210 and n(1p)210. No. It is not true that both nple and n(1p)210