A real estate agent collected information on some recent local home sales. The first six lines of the database appear below. The columns correspond to the house identification number, the community name, the property’s number of acres, the year the house was built, the market value (in $), and the size of the living area (in square feet).

a) What does a row correspond to in this data table? How would you best describe its role: as a participant, subject, case, respondent, or experimental unit?

b) How many variables are measured in each row?

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NEIGHBOURHOOD YR_BUILT 1967 FULL_MARKET_VALUE HOUSE_ID 413400536 ACRES SFLA 1.00 0.09 1.65 100400 132500 140000 Greenfield Manor Fort Amherst 960 4128001474 1961 1993 906 412800344 Dublin 1620 4128001552 Granite Springs 1969 900 0.33 67100 412800352 2.29 9.13 1955 190000 Arcady 1224 413400322 1997 1056 Ormsbee 126900