Question 31
A manufacturer of moisturizing lotions wants to do a sample survey about the brand standing of its brand. It plans to do a house-to-house multistage cluster sampling survey. Thecompany classifies its customers based on skin type (dry / oily / normal) and age (Young / Early middle age / Late middle age / Elder) and customizes its designs accordingly. The company wants to do the study in two cities. The company wants to have a robust sample size in EACH city with no compromises. What should be the sample size?