In the type case we consider, the ultimate issue is whether an employer regularly and purposefully treats or has treated blacks less favorably than whites and whether this disparate treatment is racially motivated. Teamsters, 431 U.S. at 335, 97 5. Ct. at 1854. The EEOC of course bears the initial burden of making out a prima facie case of discrimination. This prima facie showing may in a proper-case be made out by statistics alone, Teamsters, 431 U.S. at 339, 97 S.Ct. at 1856; Hazelwood, 433 U.S. at 307-08, 97 S.Ct. at 2741-42; Barnett v. W. T. Grant Co., 518 F.2d 543, 549 (4th Cir. 1975), or by a cumulation of evidence, including statistics, patterns, practices, general policies, or specific instances of discrimination. See Barnett v. W. T. Grant Co., 518 F.2d at 549; Brown v. Gas-ton County Dyeing Machine Co., 457 F.2d 1377, 1382 (4th Cir. 1972). If the prima facie case is established by the EEOC’s statistical evidence, the employer may nevertheless rebut it, dispelling the inference of a general policy of discrimination, by “demonstrating that the Government’s proof is either inaccurate or insignificant.” Teamsters, 431 U.S. at 360, 97 S.Ct. at 1867. One way that static work force statistics revealing gross disparities can be shown nevertheless to be “insignificant” is by showing that the disparities are mainly attributable to pre-Act rather than to post-Act employment actions. This may be done in two basic ways: by focusing on the static work force statistics and purging them of all pre-Act employment actions so that only post-Act actions remain for assessment; or, more commonly, by focusing on post-Act employment decisions, and showing either that considered alone, they affirmatively reveal nondiscrimination in the post-Act period or that they are insufficient in number to support an ultimate conclusion of a post-Act discriminatory pattern or practice.6 Hazelwood, 433 U.S. at 309, 313, 97 S.Ct. at 2742, 2744.
In the instant case, the EEOC sought within this scheme of proof to make out a prima facie case by a combination of static work force statistical evidence covering the charge period, evidence of specific hiring practices followed by ANB during that period, and evidence of specific instances of individual discriminatory actions during the period. In attempted rebuttal of the statistical evidence, ANB sought to establish its “insignificance,” rather than its “inaccuracy” in any computational or objective fact sense. Its chosen means of showing probative insignificance was two-fold: by subjecting it to a standard deviation analysis, to reveal its weakness as proof of a regular operating policy of purposeful discrimination; and by showing, through applicant flow statistical data, that its post-Act decisions were manifestly nondiscriminatory when considered in relation to its hiring opportunities during that period, particularly when subjected to a standard deviation analysis.
It is with respect to the evidence offered by the parties to support these positions that the district judge committed the specific legal errors of analysis that we now address.
First off, the court’s analysis reveals a basic misapprehension of the relationship between statistical and nonstatistical evidence offered to establish a prima facie case, of the relationship between these and evidence tending to rebut any prima facie case established, and of the appropriate mode of analysis under the disparate treatment proof scheme. This appears in the following way.
Although the court concluded that the EEOC had proved a prima facie case of a pattern of racial discrimination in hiring by ANB between 1969 and 1975, 21 F.E.P. Cases at 1552, it then found that “[t]he available hiring statistics, [a standard deviation] analysis, the evidence concerning the hiring practices of defendant, and the 31
6
Just as in EEOC v. United Bank/Seaboard National, 615 F.2d 147, 149 (4th Cir. 1980): “there is no claim of other racial discrimination in such things as promotions, transfers, pay, etc., which, as often as not, appear in litigation of this nature.”