## Question

###### In New York City, survey was planned to investigate the average price of "food basket" with basic needs (Ex: Bread, butter, milk; etc ); and to see whether food prices differ among different parts of the city. The sampling frame consisted of 408 food stores with at least 4000 square feet of retail space_ The population of stores was stratified into three strata using median household income within the zip code_ The prices of "market basket" of goods were determined for each s

In New York City, survey was planned to investigate the average price of "food basket" with basic needs (Ex: Bread, butter, milk; etc ); and to see whether food prices differ among different parts of the city. The sampling frame consisted of 408 food stores with at least 4000 square feet of retail space_ The population of stores was stratified into three strata using median household income within the zip code_ The prices of "market basket" of goods were determined for each store_ Explain why stratification by household incomc would bc uscful in thc contert of this problem

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