Using the 2006 General Social Survey, in SPSS:

a)Construct and interpret a95% confidence interval for the truemean years of education [educ], overall andcontrolling for gender.

Descriptives Statistic Std. Error AGE WHEN FIRST Mean 23.33 180 MARRIED 99% Confidence Interval Lower Bound 22.87 for Mean Upper Bound 23.79 5% Trimmed Mean 22.72 Median 22.00 Variance 37.532 Std. Deviation 6.126 Minimum 13 Maximum 90 Range 77 Interquartile Range 7 Skewness 2.927 072 Kurtosis 18.556 143Descriptives RESPONDENTS SEX Statistic Std. Error AGE WHEN FIRST MALE Mean 24.85 261 MARRIED 99% Confidence Interval Lower Bound 24.18 for Mean Upper Bound 25.52 5% Trimmed Mean 24.28 Median 23.00 Variance 35.697 Std. Deviation 5.975 Minimum 16 Maximum 65 Range 49 Interquartile Range 6 Skewness 1.829 .107 Kurtosis 5.774 213 FEMALE Mean 22.08 237 99% Confidence Interval Lower Bound 21.46 for Mean Upper Bound 22.69 5% Trimmed Mean 21.47 Median 21.00 Variance 35.619 Std. Deviation 5.968 Minimum 13 Maximum 90 Range 77 Interquartile Range 5 Skewness 4.272 097 Kurtosis 35.102 194Descriptives Statistic Std. Error HIGHEST YEAR OF Mean 13.29 .048 SCHOOL COMPLETED 95% Confidence Interval Lower Bound 13.20 for Mean Upper Bound 13.39 5% Trimmed Mean 13.43 Median 13.00 Variance 10.428 Std. Deviation 3.229 Minimum 0 Maximum 20 Range 20 Interquartile Range 4 Skewness -.728 .037 Kurtosis 1.982 073Descriptives RESPONDENTS SEX Statistic Std. Error HIGHEST YEAR OF MALE Mean 13.35 076 SCHOOL COMPLETED 95% Confidence Interval Lower Bound 13.20 for Mean Upper Bound 13.50 5% Trimmed Mean 13.49 Median 13.00 Variance 11.407 Std. Deviation 3.377 Minimum 0 Maximum 20 Range 20 Interquartile Range 4 Skewness -.696 055 Kurtosis 1.724 .109 FEMALE Mean 13.25 .062 95% Confidence Interval Lower Bound 13.13 for Mean Upper Bound 13.37 5% Trimmed Mean 13.38 Median 13.00 Variance 9.646 Std. Deviation 3.106 Minimum 0 Maximum 20 Range 20 Interquartile Range 4 Skewness -.767 049 Kurtosis 2.214 098