Final answer:
The Consumer Price Index (CPI) in the United States is based on the purchases of the average household. The CPI basket consists of items that an average urban household buys, with housing having the greatest weight at 42%.
Step-by-step explanation:
The Consumer Price Index (CPI) in the United States is calculated based on a basket of goods and services that represents the purchases of the average household. The CPI basket consists of items that an average urban household buys. The greatest weight in the CPI basket is given to housing, at 42%.