***Public and Private School Principle in the United States: A Statistical Profile, 1987-88 to 1993-94*****Table B30.�Standard errors for Table A30:  Percentage of private school principals by private           school type, by sex, race-ethnicity, highest degree earned, average age, salary,           and years as a principal:  1993-94**----------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                          Private school typology                          --------------------------------------------------------------------------------------------------------------------------------------------                                          Catholic                                Other religious                                    Nonsectarian                           ------------------------------------------  ----------------------------------------------  -----------------------------------------------                                                                                    Conser-                                                    Dioc-     Private                vative      Affili-    Unaffil-                            Special     SpecialPrincipal characteristics   All      Parochial     esan       order        All      Christian    ated       iated        All       Regular     emphasis    education----------------------------------------------------------------------------------------------------------------------------------------------------------------------Total number                 21.3      110.5       98.4        51.1       254.1      189.9      160.5       251.5       223.5       173.4       136.7       109.8Sex  Male                       1.02       1.49       2.24        3.42        1.91       2.83       2.97        4.05        1.90        3.23        3.25        5.48  Female                     1.02       1.49       2.24        3.42        1.91       2.83       2.97        4.05        1.90        3.23        3.25        5.48Race-ethnicity  American Indian/   Alaska Native             0.26         �          �           �         0.14         �          �           �           �           �           �           �  Asian/Pacific   Islander                  0.00       0.00       0.00        0.00        0.20       0.00       0.51        0.49        0.65        0.24        2.07        1.14  Black non-Hispanic         0.44       0.68       0.44          �         0.90       1.42       1.16        1.78        1.06        2.37        0.82        0.37  White non-Hispanic         0.74       1.08       0.99        2.44        0.93       1.66       1.57        1.86        1.91        2.92        3.09        3.83  Hispanic                   0.55       0.83       0.87        2.11        0.34         �        0.40          �         1.24        0.88        2.21        3.55Total minority               0.74       1.08       0.99        2.44        0.93       1.66       1.57        1.86        1.91        2.92        3.09        3.83Highest degree earned  Less than bachelor's         �          �        0.00        0.00        2.04       2.88       1.76        5.27        2.25        4.30        3.40          �  Bachelor's                 1.03       1.53       1.41        2.09        2.18       3.86       3.42        4.19        3.28        5.08        4.87        4.56  Master's                   1.50       1.80       1.89        3.78        1.64       3.00       3.19        2.92        3.28        4.96        5.52        7.53  Ed. spec./prof. dipl.      1.01       1.10       1.95        2.75        0.66       1.03       0.89        1.34        1.22        1.71        2.50        4.10  Doctorate                  0.42       0.45       0.67        2.58        0.71       1.10       1.16        1.22        1.62         2.1        2.48        5.00Average age                  0.25       0.36       0.40        0.81        0.46       0.53       0.84        1.20        0.50        0.97        0.81        0.96Average salary            $318.50    $394.04    $484.12    1,484.66     $504.47    $821.52    $644.25   $1,160.16   $1,084.23   $1,968.36   $2,052.06   $1,218.32Average years as principal   0.22       0.31       0.36        0.50        0.27       0.42       0.49        0.52        0.58        0.99        0.60        0.70----------------------------------------------------------------------------------------------------------------------------------------------------------------------          � Too few cases for a reliable estimateSOURCE:  U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey:  1993-94 (Private School Principal and SchoolQuestionnaires).