Marketing and Consumer Behavior The manager of a CVS drugstore in Madison, Wisconsin, obtained a random sample of customers who purchased adhesive bandages. The brands and frequencies are given in the following table.
Historical records indicate that the population proportions are Band-Aid 0.2, Curad 0.2, Nexcare 0.1, and Generic 0.5. Conduct a goodness-of-fit test to determine whether there is any evidence to suggest that the data are not consistent with the past proportions. Use a = 0.01.