Question

A real estate major collected information on some recent local home sales. The first 6 lines of the database appear below. The columns correspond to the house identification number, the community name, the ZIP code, the number of acres of the property, the year the house was built, the market value, and the size of the living area (in square feet).

House_ID	Neighborhood	Mail_ZIP	Acres	Yr_Built	Full_Market_Value	Size
41340053	Greenfield Manor	12859	1.00	1967	$1,00,400	960
4128001474	Fort Amherst	12801	.009	1961	$1,32,500	90
412800344	Dublin	12309	1.65	1993	$1,40,000	1620
4128001552	Granite Springs	10598	0.33	1969	$67,100	900
412800352	Arcady	10562	2.29	1955	$1,90,000	1224
413400322	Ornsbee	12859	9.13	1997	$1,26,900	1056

For the real estate data of Exercise 1, do the data appear to have come from a designed survey or experiment? What concerns might you have about drawing conclusions from this data set?

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Answer 1

A real estate major collected information on some recent local home sales. The first 6 lines of the database appear below. The columns correspond to the house identification number, the community name, the ZIP code, the number of acres of the property, the year the house was built, the market value, and the size of the living area (in square feet).

House_ID	Neighborhood	Mail_ZIP	Acres	Yr_Built	Full_Market_Value	Size
41340053	Greenfield Manor	12859	1.00	1967	$1,00,400	960
4128001474	Fort Amherst	12801	.009	1961	$1,32,500	90
412800344	Dublin	12309	1.65	1993	$1,40,000	1620
4128001552	Granite Springs	10598	0.33	1969	$67,100	900
412800352	Arcady	10562	2.29	1955	$1,90,000	1224
413400322	Ornsbee	12859	9.13	1997	$1,26,900	1056

For the real estate data of Exercise 1, do the data appear to have come from a designed survey or experiment? What concerns might you have about drawing conclusions from this data set?

There is no intervention on the subjects ( house) by the researcher(real estate major). Therefore the data have come from a designed survey.

There is no where mentioned about the sample selection. This concerns whether data are randomly selected from the study population, that is data represents the population. Therefore it requires greater care in presenting the results, about drawing conclusions from this data set to the population.