***Public and Private School Principle in the United States: A Statistical Profile, 1987-88 to 1993-94*****Table B6.-Standard errors for Table A6:  Percentage of public and private school principals           by school level, by sex, race-ethnicity, and age:  1987-88, 1990-91, and 1993-94**---------------------------------------------------------------------------------------------------------------------------------------------------                                                                                          School level                                        -----------------------------------------------------------------------------------------------------------                                                    Elementary                             Secondary                             Combined                                          -----------------------------         -----------------------------         -----------------------------Principal characteristics                 1987-88    1990-91    1993-94         1987-88    1990-91    1993-94         1987-88    1990-91    1993-94---------------------------------------------------------------------------------------------------------------------------------------------------PUBLICSex Male                                        0.74       0.86       0.99            0.54       0.79       0.66            1.53       1.86       1.85 Female                                      0.74       0.86       0.99            0.54       0.79       0.66            1.53       1.86       1.85Race-ethnicity American Indian/Alaska Native               0.17       0.12       0.12            0.25       0.27       0.14            0.60       0.40       0.39 Asian/Pacific Islander                      0.09       0.19       0.20            0.14       0.10       0.09            0.13       0.12       0.18 Black non-Hispanic                          0.46       0.50       0.58            0.38       0.45       0.38            1.03       1.02       0.65 White non-Hispanic                          0.44       0.66       0.79            0.53       0.58       0.57            1.03       1.41       1.04 Hispanic                                    0.24       0.43       0.48            0.32       0.33       0.39            0.28       0.74       0.75Total minority                               0.44       0.66       0.79            0.53       0.58       0.57            1.03       1.41       1.04Age Under 35                                    0.41       0.43       0.23            0.34       0.29       0.26            0.79       1.27       0.49 35-39                                       0.62       0.62       0.49            0.73       0.60       0.44            1.22       1.76       0.60 40-44                                       0.53       0.95       0.80            1.04       1.00       0.77            1.41       2.02       1.70 45-49                                       0.67       0.90       0.67            0.72       1.00       0.73            1.15       1.56       3.19 50-54                                       0.52       0.75       0.76            0.75       0.71       0.74            1.26       2.11       2.93 55 or over                                  0.56       0.76       0.69            0.68       0.86       0.58            1.13       1.38       1.52Average age                                  0.11       0.16       0.12            0.13       0.16       0.10            0.23       0.39       0.26---------------------------------------------------------------------------------------------------------------------------------------------------          See footnotes at end of tables.**Table B6.-Standard errors for Table A6:  Percentage of public and private school principals           by school level, by sex, race-ethnicity, and age:  1987-88, 1990-91, and 1993-94          (continued)**---------------------------------------------------------------------------------------------------------------------------------------------------                                                                                          School level                                        -----------------------------------------------------------------------------------------------------------                                                    Elementary                             Secondary                             Combined                                          -----------------------------         -----------------------------         -----------------------------Principal characteristics                 1987-88    1990-91    1993-94         1987-88    1990-91    1993-94         1987-88    1990-91    1993-94---------------------------------------------------------------------------------------------------------------------------------------------------PRIVATESex Male                                        1.75       1.57       1.79            4.07       2.54       2.91            2.79       2.23       2.62 Female                                      1.75       1.57       1.79            4.07       2.54       2.91            2.79       2.23       2.62Race-ethnicity American Indian/Alaska Native                 -          -          -               -          -          -               -          -          - Asian/Pacific Islander                        -          -          -               -          -          -               -          -          - Black non-Hispanic                          0.67       0.70       0.82            0.89       0.62       0.58            0.99       0.75       0.62 White non-Hispanic                          0.88       0.80       1.00            2.98       1.12       0.84            1.59       1.33       1.20 Hispanic                                    0.52       0.41       0.44            3.08       0.83       0.66            1.06       0.74       0.92Total minority                               0.88       0.80       1.00            2.98       1.12       0.84            1.59       1.33       1.20Age Under 35                                    1.08       1.22       1.09            2.09       1.00       0.71            2.21       2.07       2.12 35-39                                       1.36       1.14       1.05            2.56       2.12       2.53            2.34       2.50       2.19 40-44                                       1.41       1.31       1.13            4.00       2.55       2.30            2.95       2.67       1.98 45-49                                       1.47       1.17       1.29            2.67       2.48       1.94            2.32       2.10       1.87 50-54                                       0.99       1.47       0.86            2.41       1.80       3.14            1.74       1.75       1.71 55 or over                                  1.15       1.31       1.52            3.23       2.08       1.51            2.26       1.48       1.96Average age                                  0.26       0.36       0.36            0.81       0.50       0.49            0.56       0.49       0.55---------------------------------------------------------------------------------------------------------------------------------------------------                -Too few cases for a reliable estimateSOURCE:  U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey: 1987-88 (School Administrator Questionnaire), 1990-91 (Public and Private School Administrator Questionnaires), and 1993-94(Public and Private School Principal Questionnaires).