B$.$ Moving Average $(40\%)$

Imagine you are a consultant hired by a retail store looking to enhance customer satisfaction. The

management wants to employ data$-$driven strategies to understand customer preferences, improve

service, and ultimately boost sales. Your task is to design a comprehensive data collection and analysis

plan.

a$)$ Identify both numerical and non$-$numerical data relevant to understanding customer

satisfaction. Explain how each data type contributes to the overall analysis.

b$)$ Propose a plan for random sampling to ensure a representative subset of customers is included.

Suggest how stratified sampling could be applied to ensure diversity in the sample, considering

factors like age, income, and location.