All the examples on this page compare males and females in my 1998 class. Please note that all calculations are performed using Microsoft Excel, and that the t-statistics are looked up on a t-table rather than a normal table, which is a good thing to do for small samples (e.g., less than 100 cases).
| GPA | ||
| Females | Males | |
| Mean | 3.22 | 2.85 |
| Var | 0.06 | 0.11 |
| Obs | 27.00 | 6.00 |
| df | 6.00 | |
| t Stat | 2.66 | |
| P(T<=t) two-tail | 0.04 | |
| t Critical two-tail | 2.45 |
| WORK | ||
| Females | Males | |
| Mean | 1.85 | 1.83 |
| Var | 0.36 | 0.57 |
| Obs | 27.00 | 6.00 |
| df | 6.00 | |
| t Stat | 0.06 | |
| P(T<=t) two-tail | 0.96 | |
| t Critical two-tail | 2.45 |
| STUDY | ||
| Females | Males | |
| Mean | 16.85 | 13.25 |
| Var | 43.25 | 44.98 |
| Obs | 27.00 | 6.00 |
| df | 7.00 | |
| t Stat | 1.19 | |
| P(T<=t) two-tail | 0.27 | |
| t Critical two-tail | 2.36 |
| ALCOHOL | ||
| Females | Males | |
| Mean | 7.69 | 18.67 |
| Var | 40.92 | 151.07 |
| Obs | 27.00 | 6.00 |
| df | 6.00 | |
| t Stat | -2.12 | |
| P(T<=t) two-tail | 0.08 | |
| t Critical two-tail | 2.45 |
| GO OUT | ||
| Females | Males | |
| Mean | 2.56 | 3.17 |
| Var | 0.74 | 1.77 |
| Obs | 27.00 | 6.00 |
| df | 6.00 | |
| t Stat | -1.08 | |
| P(T<=t) two-tail | 0.32 | |
| t Critical two-tail | 2.45 |
| HEIGHT | ||
| Females | Males | |
| Mean | 5.41 | 5.94 |
| Var | 0.04 | 0.06 |
| Obs | 27.00 | 6.00 |
| df | 6.00 | |
| t Stat | -4.93 | |
| P(T<=t) two-tail | 0.00 | |
| t Critical two-tail | 2.45 |
| WEIGHT | VERBAL | MATH | ||||||||
| Females | Males | Females | Males | Females | Males | |||||
| Mean | 126.08 | 164.67 | Mean | 530.00 | 513.33 | Mean | 591.92 | 618.33 | ||
| Var | 222.24 | 474.67 | Var | 3920.00 | 7346.67 | Var | 4560.15 | 2696.67 | ||
| Obs | 25.00 | 6.00 | Obs | 26.00 | 6.00 | Obs | 26.00 | 6.00 | ||
| df | 6.00 | df | 6.00 | df | 9.00 | |||||
| t Stat | -4.11 | t Stat | 0.45 | t Stat | -1.06 | |||||
| P(T<=t) two-tail | 0.01 | P(T<=t) two-tail | 0.67 | P(T<=t) two-tail | 0.32 | |||||
| t Critical two-tail | 2.45 | t Critical two-tail | 2.45 | t Critical two-tail | 2.26 | |||||
| EXTRO | SENSE | THINK | ||||||||
| Females | Males | Females | Males | Females | Males | |||||
| Mean | 41.85 | 28.33 | Mean | 48.41 | 60.00 | Mean | 67.22 | 57.50 | ||
| Var | 554.13 | 576.67 | Var | 301.17 | 1130.00 | Var | 394.87 | 567.50 | ||
| Obs | 27.00 | 6.00 | Obs | 27.00 | 6.00 | Obs | 27.00 | 6.00 | ||
| df | 7.00 | df | 6.00 | df | 7.00 | |||||
| t Stat | 1.25 | t Stat | -0.82 | t Stat | 0.93 | |||||
| P(T<=t) two-tail | 0.25 | P(T<=t) two-tail | 0.44 | P(T<=t) two-tail | 0.38 | |||||
| t Critical two-tail | 2.36 | t Critical two-tail | 2.45 | t Critical two-tail | 2.36 | |||||
| JUDGE | ||||||||||
| Females | Males | |||||||||
| Mean | 27.85 | 57.50 | ||||||||
| Var | 328.05 | 317.50 | ||||||||
| Obs | 27.00 | 6.00 | ||||||||
| df | 7.00 | |||||||||
| t Stat | -3.68 | |||||||||
| P(T<=t) two-tail | 0.01 | |||||||||
| t Critical two-tail | 2.36 |