Update README.md

README.md

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 * 1 school - student's school (binary: 'GP' - Gabriel Pereira or 'MS' - Mousinho da Silveira)
 * 2 sex - student's sex (binary: 'F' - female or 'M' - male)
 * 3 age - student's age (numeric: from 15 to 22)
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 * 4 address - student's home address type (binary: 'U' - urban or 'R' - rural)
 * 5 famsize - family size (binary: 'LE3' - less or equal to 3 or 'GT3' - greater than 3)
 * 6 Pstatus - parent's cohabitation status (binary: 'T' - living together or 'A' - apart)
@@ -16,28 +16,28 @@
 * 8 Fedu - father's education (numeric: 0 - none,  1 - primary education (4th grade), 2 – 5th to 9th grade, 3 – secondary education or 4 – higher education)
 * 9 Mjob - mother's job (nominal: 'teacher', 'health' care related, civil 'services' (e.g. administrative or police), 'at_home' or 'other')
 * 10 Fjob - father's job (nominal: 'teacher', 'health' care related, civil 'services' (e.g. administrative or police), 'at_home' or 'other')
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 * 11 reason - reason to choose this school (nominal: close to 'home', school 'reputation', 'course' preference or 'other')
 * 12 guardian - student's guardian (nominal: 'mother', 'father' or 'other')
 * 13 traveltime - home to school travel time (numeric: 1 - <15 min., 2 - 15 to 30 min., 3 - 30 min. to 1 hour, or 4 - >1 hour)
 * 14 studytime - weekly study time (numeric: 1 - <2 hours, 2 - 2 to 5 hours, 3 - 5 to 10 hours, or 4 - >10 hours)
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 * 15 failures - number of past class failures (numeric: n if 1<=n<3, else 4)
 * 16 schoolsup - extra educational support (binary: yes or no)
 * 17 famsup - family educational support (binary: yes or no)
 * 18 paid - extra paid classes within the course subject (Math or Portuguese) (binary: yes or no)
 * 19 activities - extra-curricular activities (binary: yes or no)
 * 20 nursery - attended nursery school (binary: yes or no)
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 * 21 higher - wants to take higher education (binary: yes or no)
 * 22 internet - Internet access at home (binary: yes or no)
 * 23 romantic - with a romantic relationship (binary: yes or no)
 * 24 famrel - quality of family relationships (numeric: from 1 - very bad to 5 - excellent)
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 * 25 freetime - free time after school (numeric: from 1 - very low to 5 - very high)
 * 26 goout - going out with friends (numeric: from 1 - very low to 5 - very high)
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 * 27 Dalc - workday alcohol consumption (numeric: from 1 - very low to 5 - very high)
 * 28 Walc - weekend alcohol consumption (numeric: from 1 - very low to 5 - very high)
 * 29 health - current health status (numeric: from 1 - very bad to 5 - very good)
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 * 30 absences - number of school absences (numeric: from 0 to 93)