TABLE 2-3 Selected Unweighted Response Rates for the SESTAT

 

Components (in percent)

Conditional Response Rate Unconditional Response Rate

Year

NSCG (Reported)

NSCG (Computed)a

NSRCG (Reported)

SDR (Reported)

1993

78

78

84

87

1995

95

74

83

85b

1997

94

70

81

84

1999

91

63

79

82

SOURCE: Data from Westat (2002a: Table 1), amended according to personal communication from SRS staff. Notes: See text for discussion. For background information also see design and methodology report on the National Science Foundation SESTAT website (http://srsstats.sbe.nsf.gov/techinfo.html).

aThe computed rates for 1995 and later are approximate. The committee acknowledges that these rates are based on assumptions that the committee has not been able to verify.

bIn 1995 a subsample of mail nonrespondents was selected for computer-assisted telephone interview (CATI) follow-up. The unweighted response rate using the total sample (including those subsampled out) as the base is 77 percent. The weighted response rate was 85 percent, as shown in the table.



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