1. Are t-tests or Z-tests used more often in business research? Why?
2. A manufacturer of disposable washcloths/wipes told a retailer that sales for this product category closely correlated with sales of disposable diapers. The retailer thought he would check this out for his own sales-forecasting purposes. The researcher says, "Disposable washcloths/wipes sales can be predicted with knowledge of disposable diaper sales." Is this the right thing to say?