The sampling variability of a specified perrestage of total primary families with designated Caracteristics will vary according to the proportion of white families and nonwhite families saking up this percentage. For example, consider the sampling variability of a figure of 13 percent based on total primary families. The maximum sampling error to be expected of such a figure would occur when the entire 10 percent Includes only white primary families and the chances are about 19 out of 20 that this sampling error would not exceed 1.7 percent. If the astire 10 percent includes only nonwhite primary families no sampling error would be present. For other specific characteristics composed of 10 percent of total primary families the sampling variability may assume any value up to the

Reliability of absolute figures in table 5.-The approximate sampling variability of the absolute figures in table 5 is shown below. The chances are 19 out of 20 that differences between the numbers shown in table 5 and the numbers that would have been obtained from a complete census would be less than the sampling errors which follow.

BY TENURE AND COLOR OF OCCUPANTS, FOR FARRELL, PENNSYLVANIA: 1950

(A substandard dwelling unit is defined by the Public Housing Administration as a unit which is either dilapidated or does not have all of the following plumbing facilities: flush toilet and bath inside the structure for the unit's exclusive use, and hot running water)

Table 1.--STRUCTURAL AND OCCUPANCY CHARACTERISTICS, CONDITION, AND PLUMBING FACILITIES OF OCCUPIED SUBSTANDARD DWELLING UNITS, BY TENURE AND COLOR OF OCCUPANTS, FOR FARRELL, PENNSYLVANIA: 1950--Con.

A substandard dwelling unit is defined by the Public Housing Administration as a unit which is either dilapidated or does not have all of the following plumbing facilities: flush toilet and bath inside the structure for the unit's exclusive use, and hot running water)

Table 2.--CONTRACT AND GROSS RENT OF RENTER-OCCUPIED SUBSTANDARD DWELLING UNITS, BY COLOR OF OCCUPANTS,
FOR FARRELL, PENNSYLVANIA: 1950

(See table 1 for the Public Housing Administration definition of substandard dwelling unit)

$50 or more.

$50 or more..

(See table 1 for the Public Housing Administration definition of substandard dwelling unit)

Table 3a.--CONDITION AND PLUMBING FACILITIES OF RENTER-OCCUPIED SUBSTANDARD DWELLING UNITS, BY GROSS RENT,
FOR WHITE HOUSEHOLDS, FOR FARRELL, PENNSYLVANIA: 1950

(See table 1 for the Public Housing Administration definition of substandard dwelling unit)

Table 3b.--CONDITION AND PLUMBING FACILITIES OF RENTER-OCCUPIED SUBSTANDARD DWELLING UNITS, BY GROSS RENT,
FOR NONWHITE HOUSEHOLDS, FOR FARRELL, PENNSYLVANIA: 1950

(See table 1 for the Public Housing Administration definition of substandard dwelling unit)

Table 4.--CHARACTERISTICS OF FAMILIES IN SUBSTANDARD DWELLING UNITS, BY TENURE AND COLOR,
FOR FARRELL, PENNSYLVANIA: 1950

(See table 1 for the Public Housing Administration definition of substandard dwelling unit)

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