Please answer the following questions:

1. The following data are scores of students on a 50-item Achievement Test in Mathematics I:

F G H K L Student Average Gender Major Country Age SAT Status score (grade) Female Graduate Politics US 30 2263 67 Female Undergraduate Math US 19 2006 63 Male Graduate Math US 26 2221 78 Male Graduate Econ US 33 1716 78 Male Graduate Econ US 37 1701 65 Male Graduate Econ Israel 25 1786 69 Male Graduate Politics US 39 1577 96 Female Undergraduate Politics US 21 1842 87 Female Undergraduate Math Canada 18 1813 91 Female Graduate Math US 33 2041 71 Male Undergraduate Econ US 18 1787 82 Female Graduate Math US 38 1513 79 Male Graduate Politics Bulgaria 30 1637 79 Male Graduate Politics Russia 30 1512 70 Female Undergraduate Math US 21 1338 82 Female Undergraduate Econ US 18 1821 80 Female Undergraduate Math Holland 19 1494 75 Female Graduate Politics Mexico 31 2248 95 Female Undergraduate Math Venezuela 18 2252 92 Male Graduate Politics US 33 1923 95 Female Undergraduate Econ US 19 1727 67 Male Undergraduate Econ US 21 1872 82 Female Graduate Politics US 25 1767 89 Female Undergraduate Math China 18 1643 79 Male Undergraduate Politics Sweden 19 1919 88 Male Graduate Econ US 28 1434 96 Male Undergraduate Math US 20 2119 88 Female Undergraduate Econ US 20 2309 64 Male Graduate Politics Argentina 30 2279 85 Male Undergraduate Econ US 19 1907 79