Variables: 1. Gender - student's gender ('F' - female or 'M' - male) 2. Travel time - home to school travel time (numeric: 1 - <15 min., 2 - 15 to 30 min., 3 - 30 min. to 1 hour, or 4 - >1 hour) 3. Study time - weekly study time (numeric: 1 - <2 hours, 2 - 2 to 5 hours, 3 - 5 to 10 hours, or 4 - >10 hours) 4. Paid - extra paid classes within the course subject (binary: yes or no) 5. Higher - wants to take higher education (binary: yes or no) 6. Famrel - quality of family relationships (numeric: from 1 - very bad to 5 - excellent) 7. Freetime - free time after school (numeric: from 1- very low to 5 - very high) 8. Absences - number of school absences (numeric: from 0 to 93) 9. Final grade (numeric: from 0 to 20) 10. Y=yes, N=No Question 1 Given the population variance of the student's final grade is 5. Find 80% confidence interval for the mean final grade of the students.
Variables: 1. Gender - student's gender ('F' - female or 'M' - male) 2. Travel time - home to school travel time (numeric: 1 - <15 min., 2 - 15 to 30 min., 3 - 30 min. to 1 hour, or 4 - >1 hour) 3. Study time - weekly study time (numeric: 1 - <2 hours, 2 - 2 to 5 hours, 3 - 5 to 10 hours, or 4 - >10 hours) 4. Paid - extra paid classes within the course subject (binary: yes or no) 5. Higher - wants to take higher education (binary: yes or no) 6. Famrel - quality of family relationships (numeric: from 1 - very bad to 5 - excellent) 7. Freetime - free time after school (numeric: from 1- very low to 5 - very high) 8. Absences - number of school absences (numeric: from 0 to 93) 9. Final grade (numeric: from 0 to 20) 10. Y=yes, N=No Question 1 Given the population variance of the student's final grade is 5. Find 80% confidence interval for the mean final grade of the students.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
100%
Thank you and upvote to any math expert who can help in answering this question.
| gender | traveltime | studytime | paid | higher | famrel | freetime | absences | finalgrade |
| M | 1 | 1 | n | y | 3 | 3 | 0 | 0 |
| F | 2 | 3 | n | y | 4 | 2 | 0 | 0 |
| F | 3 | 1 | n | y | 4 | 3 | 0 | 0 |
| M | 4 | 2 | n | y | 5 | 3 | 0 | 0 |
| F | 1 | 3 | n | y | 4 | 3 | 0 | 0 |
| M | 3 | 2 | n | y | 5 | 4 | 0 | 0 |
| F | 2 | 1 | n | y | 4 | 3 | 0 | 0 |
| M | 2 | 4 | n | y | 2 | 2 | 0 | 0 |
| M | 1 | 1 | n | y | 5 | 4 | 0 | 0 |
| F | 1 | 2 | n | y | 3 | 3 | 0 | 0 |
| M | 1 | 1 | n | n | 3 | 3 | 0 | 0 |
| M | 1 | 1 | n | n | 2 | 3 | 0 | 0 |
| M | 1 | 1 | n | n | 4 | 5 | 0 | 0 |
| M | 2 | 1 | n | n | 3 | 3 | 0 | 0 |
| M | 2 | 1 | n | y | 4 | 4 | 0 | 0 |
| F | 1 | 2 | y | y | 5 | 1 | 0 | 0 |
| M | 3 | 1 | n | y | 3 | 4 | 0 | 0 |
| F | 1 | 2 | n | y | 4 | 3 | 0 | 0 |
| F | 1 | 3 | n | y | 4 | 3 | 0 | 0 |
| M | 1 | 2 | n | n | 5 | 5 | 0 | 0 |
| M | 1 | 1 | n | y | 5 | 4 | 0 | 0 |
| F | 2 | 3 | y | y | 4 | 4 | 0 | 0 |
| F | 1 | 4 | y | y | 3 | 4 | 0 | 0 |
| F | 1 | 3 | y | y | 4 | 3 | 0 | 0 |
| F | 2 | 2 | n | n | 4 | 3 | 0 | 0 |
| F | 2 | 2 | y | y | 2 | 3 | 0 | 0 |
| F | 1 | 2 | n | y | 4 | 2 | 0 | 0 |
| F | 2 | 2 | y | y | 5 | 3 | 0 | 0 |
| F | 1 | 2 | n | y | 5 | 3 | 0 | 0 |
| F | 1 | 2 | n | y | 4 | 3 | 0 | 0 |
| F | 2 | 4 | n | y | 4 | 4 | 0 | 0 |
| F | 1 | 2 | y | y | 4 | 3 | 0 | 0 |
| M | 1 | 2 | n | y | 4 | 3 | 0 | 0 |
| F | 1 | 2 | n | y | 3 | 3 | 0 | 0 |
| F | 3 | 1 | y | y | 5 | 2 | 0 | 0 |
| M | 2 | 1 | n | y | 4 | 3 | 0 | 0 |
| F | 1 | 3 | n | y | 5 | 4 | 0 | 0 |
| F | 2 | 2 | n | y | 1 | 1 | 0 | 0 |
| F | 1 | 2 | y | y | 3 | 4 | 22 | 4 |
| M | 1 | 1 | n | y | 5 | 5 | 16 | 5 |
| F | 1 | 2 | n | y | 3 | 3 | 2 | 5 |
| F | 1 | 2 | n | y | 2 | 4 | 12 | 5 |
| M | 1 | 1 | y | y | 4 | 5 | 14 | 5 |
| M | 1 | 2 | n | y | 4 | 3 | 8 | 5 |
| F | 1 | 1 | n | y | 3 | 5 | 14 | 5 |
| M | 2 | 1 | y | y | 5 | 4 | 14 | 5 |
| F | 2 | 2 | n | y | 4 | 3 | 6 | 6 |
| F | 1 | 2 | n | y | 5 | 3 | 4 | 6 |
| F | 2 | 2 | n | y | 4 | 1 | 6 | 6 |
| F | 2 | 1 | n | y | 3 | 5 | 0 | 6 |
| F | 1 | 2 | y | y | 5 | 2 | 8 | 6 |
| F | 1 | 4 | y | y | 4 | 3 | 4 | 6 |
| F | 1 | 2 | y | y | 4 | 4 | 10 | 6 |
| F | 1 | 2 | n | y | 4 | 3 | 4 | 6 |
| F | 1 | 2 | n | y | 3 | 3 | 4 | 6 |
| F | 2 | 2 | y | y | 4 | 3 | 26 | 6 |
| M | 1 | 2 | n | y | 4 | 3 | 4 | 6 |
| F | 1 | 1 | n | y | 5 | 3 | 18 | 6 |
| F | 2 | 2 | n | y | 4 | 2 | 2 | 6 |
| M | 2 | 2 | y | y | 3 | 4 | 18 | 6 |
| F | 3 | 1 | y | y | 4 | 4 | 7 | 6 |
| F | 1 | 2 | n | y | 4 | 4 | 2 | 7 |
| M | 1 | 2 | n | y | 4 | 1 | 18 | 7 |
| M | 2 | 2 | n | y | 4 | 4 | 6 | 7 |
| M | 4 | 2 | n | n | 5 | 3 | 0 | 7 |
| F | 1 | 2 | y | y | 2 | 3 | 5 | 7 |
| F | 2 | 3 | y | y | 4 | 4 | 6 | 7 |
| F | 1 | 2 | n | y | 5 | 3 | 16 | 7 |
| M | 2 | 1 | n | y | 4 | 4 | 5 | 7 |
| M | 1 | 1 | n | y | 5 | 5 | 3 | 7 |
| F | 1 | 3 | y | y | 4 | 3 | 2 | 8 |
| F | 1 | 1 | y | y | 1 | 2 | 14 | 8 |
| F | 2 | 2 | y | y | 4 | 1 | 2 | 8 |
| F | 2 | 2 | y | y | 4 | 4 | 6 | 8 |
| F | 1 | 3 | y | y | 4 | 3 | 0 | 8 |
| F | 1 | 3 | y | y | 5 | 3 | 0 | 8 |
| F | 1 | 4 | y | y | 5 | 1 | 8 | 8 |
| M | 3 | 2 | n | y | 5 | 2 | 20 | 8 |
| F | 1 | 2 | y | y | 5 | 4 | 0 | 8 |
| M | 1 | 2 | y | y | 4 | 4 | 2 | 8 |
| M | 1 | 2 | y | y | 3 | 4 | 10 | 8 |
| F | 1 | 2 | n | y | 5 | 3 | 56 | 8 |
| M | 2 | 2 | y | y | 4 | 4 | 12 | 8 |
| F | 1 | 4 | y | y | 4 | 3 | 10 | 8 |
| M | 1 | 2 | y | y | 4 | 4 | 15 | 8 |
| M | 1 | 2 | y | y | 3 | 2 | 13 | 8 |
| F | 2 | 1 | y | y | 3 | 3 | 3 | 8 |
| M | 1 | 1 | n | n | 5 | 4 | 16 | 8 |
| M | 2 | 1 | n | n | 4 | 4 | 0 | 8 |
| M | 1 | 1 | n | n | 3 | 2 | 4 | 8 |
| M | 2 | 1 | n | y | 3 | 3 | 0 | 8 |
| M | 2 | 1 | n | y | 4 | 4 | 2 | 8 |
| M | 1 | 2 | y | y | 4 | 3 | 2 | 8 |
| F | 1 | 2 | n | y | 2 | 4 | 15 | 8 |
| M | 2 | 1 | y | y | 4 | 5 | 30 | 8 |
| F | 2 | 2 | y | y | 4 | 4 | 10 | 8 |
| M | 2 | 1 | y | y | 4 | 3 | 38 | 8 |
| M | 1 | 4 | n | y | 4 | 5 | 2 | 8 |
| M | 3 | 2 | n | y | 5 | 4 | 8 | 8 |
| M | 1 | 1 | n | n | 4 | 3 | 7 | 8 |
| M | 3 | 1 | n | y | 4 | 4 | 4 | 8 |
| F | 1 | 2 | y | y | 4 | 3 | 0 | 8 |
| F | 1 | 2 | y | y | 3 | 3 | 0 | 9 |
| F | 2 | 2 | n | y | 4 | 3 | 14 | 9 |
| M | 1 | 2 | n | y | 4 | 3 | 2 | 9 |
| F | 1 | 2 | n | y | 4 | 4 | 4 | 9 |
| F | 1 | 3 | y | y | 3 | 4 | 2 | 9 |
| M | 1 | 2 | n | y | 5 | 4 | 8 | 9 |
| F | 1 | 2 | n | n | 3 | 4 | 2 | 9 |
| M | 2 | 1 | n | y | 2 | 3 | 8 | 9 |
| F | 2 | 2 | y | y | 4 | 4 | 4 | 9 |
| M | 2 | 2 | y | y | 4 | 4 | 4 | 9 |
| M | 1 | 1 | n | y | 4 | 3 | 10 | 9 |
| F | 1 | 2 | n | y | 3 | 3 | 6 | 9 |
| F | 1 | 2 | n | y | 5 | 3 | 0 | 9 |
| F | 1 | 3 | y | y | 4 | 4 | 28 | 9 |
| M | 4 | 2 | y | y | 4 | 3 | 14 | 9 |
| M | 1 | 2 | n | y | 4 | 5 | 14 | 9 |
| F | 1 | 3 | n | y | 3 | 2 | 4 | 9 |
| F | 1 | 2 | y | y | 4 | 3 | 15 | 9 |
| F | 2 | 2 | n | n | 4 | 1 | 75 | 9 |
| M | 2 | 1 | y | y | 3 | 2 | 22 | 9 |
| F | 1 | 3 | y | y | 4 | 3 | 9 | 9 |
| F | 1 | 2 | n | y | 4 | 2 | 12 | 9 |
| F | 1 | 3 | y | y | 5 | 4 | 7 | 9 |
| M | 1 | 3 | y | y | 5 | 4 | 0 | 9 |
| F | 1 | 2 | n | y | 5 | 3 | 0 | 9 |
| F | 2 | 2 | n | y | 3 | 2 | 4 | 9 |
| M | 1 | 2 | y | y | 5 | 5 | 11 | 9 |
| M | 1 | 1 | n | y | 3 | 2 | 5 | 9 |
| F | 1 | 2 | y | y | 4 | 3 | 10 | 10 |
| F | 1 | 2 | y | y | 4 | 3 | 4 | 10 |
| F | 3 | 2 | n | y | 5 | 3 | 4 | 10 |
| M | 1 | 1 | y | y | 3 | 1 | 4 | 10 |
| M | 2 | 1 | n | y | 5 | 5 | 6 | 10 |
| F | 1 | 2 | y | y | 5 | 3 | 8 | 10 |
| F | 1 | 2 | n | y | 4 | 4 | 0 | 10 |
| M | 1 | 4 | n | y | 3 | 3 | 0 | 10 |
| M | 1 | 2 | y | y | 4 | 3 | 6 | 10 |
| M | 2 | 4 | n | y | 3 | 4 | 8 | 10 |
| M | 2 | 1 | n | n | 4 | 5 | 2 | 10 |
| F | 1 | 2 | n | y | 4 | 3 | 2 | 10 |
| M | 2 | 2 | y | y | 4 | 4 | 12 | 10 |
| F | 2 | 2 | y | y | 5 | 3 | 0 | 10 |
| F | 2 | 4 | y | y | 3 | 1 | 2 | 10 |
| F | 1 | 2 | y | y | 4 | 3 | 2 | 10 |
| F | 1 | 3 | n | y | 4 | 1 | 0 | 10 |
| M | 4 | 1 | n | y | 4 | 5 | 0 | 10 |
| F | 2 | 3 | y | y | 4 | 2 | 8 | 10 |
| F | 3 | 1 | n | y | 5 | 2 | 6 | 10 |
| M | 1 | 1 | n | n | 5 | 3 | 2 | 10 |
| M | 1 | 2 | n | n | 4 | 3 | 4 | 10 |
| M | 1 | 2 | y | y | 4 | 4 | 0 | 10 |
| M | 1 | 2 | n | y | 3 | 1 | 4 | 10 |
| M | 1 | 1 | n | y | 4 | 3 | 8 | 10 |
| M | 3 | 1 | y | y | 3 | 3 | 8 | 10 |
| F | 1 | 2 | y | y | 4 | 5 | 0 | 10 |
| F | 1 | 2 | y | y | 4 | 4 | 6 | 10 |
| F | 1 | 2 | y | y | 4 | 4 | 4 | 10 |
| F | 2 | 1 | y | y | 4 | 3 | 6 | 10 |
| F | 1 | 1 | y | y | 5 | 2 | 12 | 10 |
| F | 1 | 3 | y | y | 4 | 3 | 4 | 10 |
| M | 2 | 3 | n | y | 5 | 3 | 10 | 10 |
| M | 3 | 2 | n | y | 5 | 3 | 6 | 10 |
| M | 1 | 2 | y | y | 5 | 4 | 2 | 10 |
| M | 1 | 2 | y | y | 5 | 4 | 10 | 10 |
| F | 2 | 2 | y | y | 4 | 3 | 2 | 10 |
| M | 2 | 1 | y | y | 4 | 2 | 8 | 10 |
| M | 1 | 1 | n | y | 4 | 4 | 19 | 10 |
| F | 2 | 2 | n | y | 5 | 4 | 4 | 10 |
| M | 2 | 1 | y | y | 4 | 1 | 0 | 10 |
| F | 1 | 2 | n | y | 4 | 4 | 18 | 10 |
| F | 1 | 3 | y | y | 4 | 3 | 0 | 10 |
| M | 4 | 1 | n | y | 4 | 4 | 8 | 10 |
| F | 1 | 2 | y | y | 4 | 3 | 4 | 10 |
| F | 1 | 3 | n | y | 4 | 3 | 4 | 10 |
| M | 2 | 1 | n | y | 3 | 3 | 4 | 10 |
| F | 2 | 2 | n | y | 4 | 3 | 0 | 10 |
| M | 2 | 2 | y | y | 3 | 3 | 4 | 10 |
| F | 2 | 1 | y | y | 5 | 2 | 0 | 10 |
| F | 4 | 3 | n | y | 4 | 3 | 2 | 10 |
| F | 1 | 2 | y | y | 5 | 4 | 4 | 10 |
| F | 1 | 2 | y | y | 4 | 5 | 17 | 10 |
| M | 2 | 2 | n | y | 4 | 4 | 2 | 10 |
| F | 2 | 3 | y | y | 5 | 3 | 2 | 10 |
| M | 3 | 1 | n | y | 4 | 4 | 0 | 10 |
| M | 1 | 2 | n | y | 4 | 4 | 0 | 11 |
| M | 2 | 2 | y | y | 5 | 4 | 2 | 11 |
| M | 1 | 1 | y | y | 4 | 2 | 2 | 11 |
| M | 1 | 2 | n | y | 5 | 3 | 4 | 11 |
| M | 1 | 2 | y | y | 4 | 4 | 16 | 11 |
| F | 1 | 3 | y | y | 4 | 3 | 2 | 11 |
| F | 2 | 2 | n | y | 3 | 3 | 25 | 11 |
| M | 1 | 1 | n | y | 5 | 4 | 0 | 11 |
| F | 1 | 2 | n | y | 2 | 3 | 12 | 11 |
| F | 1 | 1 | y | y | 3 | 3 | 0 | 11 |
| F | 1 | 2 | n | y | 2 | 4 | 6 | 11 |
| F | 4 | 1 | n | y | 5 | 5 | 6 | 11 |
| F | 1 | 2 | y | y | 4 | 3 | 54 | 11 |
| F | 1 | 4 | y | y | 5 | 2 | 0 | 11 |
| M | 1 | 3 | y | y | 5 | 3 | 4 | 11 |
| F | 1 | 4 | n | y | 4 | 3 | 10 | 11 |
| F | 1 | 2 | n | y | 5 | 3 | 0 | 11 |
| F | 1 | 1 | n | y | 3 | 2 | 16 | 11 |
| F | 1 | 3 | y | y | 4 | 2 | 2 | 11 |
| F | 1 | 2 | y | y | 4 | 4 | 0 | 11 |
| F | 1 | 2 | y | y | 4 | 3 | 2 | 11 |
| F | 2 | 2 | y | y | 3 | 4 | 2 | 11 |
| M | 1 | 2 | n | y | 5 | 2 | 4 | 11 |
| M | 1 | 2 | n | y | 4 | 3 | 12 | 11 |
| M | 1 | 1 | y | y | 3 | 3 | 2 | 11 |
| F | 2 | 4 | y | y | 5 | 3 | 6 | 11 |
| M | 2 | 2 | y | y | 4 | 5 | 4 | 11 |
| F | 3 | 2 | n | y | 2 | 1 | 2 | 11 |
| M | 1 | 2 | n | y | 4 | 3 | 12 | 11 |
| F | 2 | 2 | y | y | 4 | 3 | 8 | 11 |
| F | 2 | 2 | y | y | 4 | 4 | 2 | 11 |
| F | 1 | 2 | n | y | 5 | 4 | 4 | 11 |
| M | 1 | 2 | y | y | 4 | 3 | 2 | 11 |
| M | 1 | 2 | y | y | 4 | 3 | 11 | 11 |
| M | 1 | 1 | y | y | 4 | 4 | 4 | 11 |
| F | 1 | 2 | n | y | 4 | 2 | 14 | 11 |
| M | 1 | 2 | n | y | 4 | 5 | 3 | 11 |
| F | 2 | 2 | y | y | 4 | 2 | 22 | 11 |
| F | 1 | 3 | n | y | 4 | 1 | 40 | 11 |
| F | 1 | 2 | y | y | 4 | 4 | 2 | 11 |
| F | 1 | 3 | y | y | 3 | 3 | 3 | 11 |
| M | 1 | 3 | n | y | 4 | 3 | 3 | 11 |
| F | 1 | 3 | y | y | 4 | 3 | 4 | 11 |
| M | 2 | 2 | y | y | 4 | 5 | 4 | 11 |
| F | 2 | 2 | n | y | 1 | 2 | 2 | 11 |
| F | 3 | 2 | y | y | 3 | 2 | 10 | 11 |
| F | 1 | 3 | n | y | 3 | 4 | 8 | 11 |
| F | 3 | 3 | n | y | 5 | 2 | 4 | 12 |
| M | 2 | 2 | n | y | 5 | 4 | 0 | 12 |
| M | 1 | 2 | y | y | 5 | 4 | 0 | 12 |
| M | 1 | 2 | n | y | 5 | 3 | 0 | 12 |
| M | 1 | 1 | n | y | 5 | 4 | 8 | 12 |
| M | 1 | 4 | n | y | 1 | 3 | 4 | 12 |
| M | 1 | 1 | y | y | 3 | 2 | 2 | 12 |
| M | 1 | 1 | n | y | 5 | 5 | 0 | 12 |
| F | 1 | 1 | n | y | 3 | 4 | 12 | 12 |
| M | 1 | 2 | n | y | 4 | 4 | 0 | 12 |
| F | 1 | 1 | n | y | 4 | 2 | 0 | 12 |
| M | 1 | 2 | y | y | 4 | 5 | 4 | 12 |
| M | 2 | 1 | n | n | 4 | 5 | 16 | 12 |
| M | 1 | 2 | y | y | 4 | 2 | 2 | 12 |
| F | 1 | 2 | y | y | 1 | 2 | 14 | 12 |
| M | 1 | 2 | y | y | 5 | 3 | 2 | 12 |
| F | 2 | 3 | n | y | 3 | 2 | 10 | 12 |
| F | 1 | 1 | n | y | 4 | 5 | 20 | 12 |
| M | 2 | 2 | n | y | 2 | 5 | 14 | 12 |
| M | 2 | 2 | y | y | 3 | 3 | 2 | 12 |
| M | 1 | 1 | n | y | 5 | 3 | 0 | 12 |
| M | 1 | 1 | n | y | 4 | 4 | 0 | 12 |
| M | 1 | 3 | n | y | 5 | 3 | 1 | 12 |
| F | 2 | 2 | y | y | 4 | 4 | 6 | 12 |
| F | 2 | 4 | y | y | 5 | 2 | 1 | 12 |
| F | 1 | 3 | y | y | 4 | 3 | 6 | 12 |
| F | 1 | 2 | y | y | 4 | 4 | 8 | 12 |
| M | 1 | 2 | n | y | 4 | 5 | 0 | 12 |
| M | 2 | 2 | n | n | 4 | 4 | 2 | 12 |
| F | 2 | 2 | n | y | 3 | 2 | 0 | 12 |
| M | 3 | 1 | y | n | 4 | 3 | 3 | 12 |
| F | 1 | 1 | y | y | 4 | 3 | 8 | 13 |
| F | 3 | 2 | y | y | 4 | 3 | 2 | 13 |
| F | 1 | 2 | y | y | 4 | 3 | 2 | 13 |
| F | 1 | 1 | y | y | 5 | 3 | 6 | 13 |
| M | 4 | 4 | y | y | 1 | 3 | 6 | 13 |
| F | 1 | 2 | n | y | 3 | 1 | 6 | 13 |
| M | 2 | 1 | n | y | 5 | 4 | 0 | 13 |
| M | 1 | 1 | n | y | 3 | 4 | 6 | 13 |
| F | 2 | 2 | y | y | 4 | 2 | 2 | 13 |
| M | 1 | 1 | n | y | 3 | 4 | 18 | 13 |
| F | 1 | 1 | n | y | 3 | 4 | 2 | 13 |
| M | 1 | 1 | n | y | 2 | 2 | 8 | 13 |
| F | 1 | 2 | n | y | 4 | 3 | 10 | 13 |
| F | 1 | 2 | y | y | 1 | 3 | 10 | 13 |
| M | 1 | 2 | y | y | 5 | 3 | 13 | 13 |
| M | 2 | 2 | y | y | 3 | 3 | 0 | 13 |
| M | 1 | 2 | y | y | 4 | 2 | 2 | 13 |
| M | 1 | 2 | y | y | 4 | 4 | 4 | 13 |
| M | 2 | 1 | n | y | 5 | 2 | 4 | 13 |
| F | 1 | 4 | y | y | 4 | 2 | 6 | 13 |
| F | 1 | 2 | n | y | 5 | 4 | 12 | 13 |
| M | 1 | 2 | n | y | 4 | 4 | 20 | 13 |
| F | 3 | 2 | n | n | 3 | 4 | 20 | 13 |
| F | 1 | 3 | n | y | 4 | 1 | 14 | 13 |
| F | 1 | 2 | y | y | 5 | 2 | 23 | 13 |
| F | 1 | 3 | y | y | 5 | 4 | 12 | 13 |
| M | 2 | 1 | n | y | 2 | 5 | 10 | 13 |
| M | 2 | 2 | y | y | 4 | 5 | 2 | 13 |
| F | 2 | 2 | y | y | 4 | 3 | 4 | 13 |
| F | 3 | 2 | n | y | 4 | 3 | 0 | 13 |
| M | 2 | 3 | y | y | 4 | 2 | 0 | 13 |
| M | 1 | 1 | y | y | 4 | 3 | 2 | 14 |
| F | 1 | 1 | n | y | 4 | 4 | 4 | 14 |
| F | 1 | 3 | y | y | 3 | 2 | 6 | 14 |
| M | 1 | 2 | y | y | 4 | 3 | 2 | 14 |
| M | 1 | 1 | n | y | 5 | 3 | 2 | 14 |
| F | 1 | 3 | n | y | 5 | 3 | 4 | 14 |
| M | 1 | 4 | n | y | 4 | 3 | 6 | 14 |
| F | 1 | 1 | n | y | 5 | 3 | 6 | 14 |
| M | 1 | 1 | n | y | 5 | 3 | 4 | 14 |
| M | 2 | 2 | n | y | 4 | 4 | 2 | 14 |
| M | 1 | 1 | n | y | 4 | 4 | 6 | 14 |
| F | 1 | 2 | y | y | 4 | 4 | 0 | 14 |
| M | 2 | 1 | n | y | 5 | 3 | 0 | 14 |
| F | 1 | 2 | y | y | 3 | 3 | 0 | 14 |
| F | 1 | 3 | n | y | 5 | 3 | 0 | 14 |
| F | 1 | 2 | n | y | 3 | 2 | 14 | 14 |
| M | 1 | 2 | n | y | 5 | 2 | 8 | 14 |
| F | 1 | 4 | y | y | 4 | 5 | 4 | 14 |
| M | 1 | 2 | y | y | 3 | 5 | 2 | 14 |
| M | 1 | 3 | y | y | 4 | 2 | 6 | 14 |
| M | 2 | 3 | y | y | 5 | 4 | 8 | 14 |
| F | 1 | 4 | y | y | 4 | 3 | 0 | 14 |
| F | 2 | 3 | y | y | 4 | 3 | 0 | 14 |
| F | 2 | 3 | y | y | 4 | 3 | 4 | 14 |
| F | 1 | 3 | n | y | 4 | 4 | 7 | 14 |
| F | 1 | 3 | n | y | 5 | 4 | 7 | 14 |
| M | 1 | 2 | y | y | 3 | 2 | 4 | 14 |
| F | 1 | 3 | y | y | 3 | 2 | 2 | 15 |
| M | 1 | 2 | y | y | 5 | 4 | 10 | 15 |
| M | 1 | 2 | y | y | 5 | 5 | 0 | 15 |
| M | 1 | 2 | n | y | 4 | 4 | 0 | 15 |
| M | 1 | 1 | y | y | 5 | 4 | 0 | 15 |
| M | 1 | 1 | y | y | 2 | 2 | 4 | 15 |
| M | 1 | 1 | y | y | 5 | 4 | 0 | 15 |
| M | 2 | 3 | n | y | 2 | 4 | 7 | 15 |
| F | 1 | 2 | y | y | 4 | 3 | 0 | 15 |
| M | 1 | 2 | n | y | 3 | 2 | 4 | 15 |
| F | 3 | 2 | n | y | 5 | 4 | 2 | 15 |
| M | 2 | 4 | y | y | 4 | 3 | 0 | 15 |
| M | 2 | 2 | y | y | 5 | 3 | 4 | 15 |
| M | 2 | 1 | n | y | 3 | 3 | 2 | 15 |
| F | 1 | 2 | n | y | 3 | 2 | 2 | 15 |
| M | 1 | 4 | y | y | 5 | 5 | 6 | 15 |
| F | 2 | 1 | n | y | 4 | 3 | 0 | 15 |
| M | 3 | 1 | n | y | 4 | 2 | 2 | 15 |
| M | 1 | 2 | y | y | 4 | 2 | 0 | 15 |
| F | 1 | 2 | n | y | 4 | 3 | 0 | 15 |
| F | 2 | 2 | y | y | 4 | 4 | 2 | 15 |
| F | 1 | 2 | n | y | 5 | 3 | 10 | 15 |
| M | 1 | 1 | y | y | 4 | 3 | 0 | 15 |
| M | 1 | 2 | y | y | 5 | 4 | 9 | 15 |
| F | 1 | 3 | y | y | 4 | 2 | 0 | 15 |
| F | 1 | 3 | n | y | 3 | 4 | 1 | 15 |
| F | 2 | 3 | n | y | 3 | 3 | 0 | 15 |
| F | 1 | 3 | n | y | 4 | 4 | 16 | 15 |
| M | 1 | 2 | n | y | 4 | 3 | 11 | 15 |
| F | 1 | 3 | y | y | 4 | 4 | 0 | 15 |
| F | 1 | 2 | y | y | 2 | 3 | 0 | 15 |
| F | 2 | 3 | y | y | 5 | 4 | 4 | 15 |
| F | 1 | 2 | y | y | 4 | 1 | 0 | 15 |
| M | 1 | 3 | n | y | 4 | 5 | 0 | 16 |
| M | 1 | 2 | n | y | 4 | 5 | 2 | 16 |
| M | 1 | 2 | n | y | 4 | 5 | 0 | 16 |
| F | 1 | 2 | n | y | 4 | 2 | 2 | 16 |
| F | 2 | 4 | n | y | 4 | 4 | 12 | 16 |
| F | 1 | 3 | y | y | 5 | 4 | 4 | 16 |
| M | 1 | 2 | n | y | 5 | 4 | 2 | 16 |
| F | 1 | 2 | y | y | 4 | 2 | 0 | 16 |
| M | 2 | 2 | y | y | 4 | 3 | 2 | 16 |
| M | 1 | 1 | n | y | 5 | 2 | 4 | 16 |
| F | 1 | 2 | n | y | 4 | 3 | 2 | 16 |
| M | 1 | 1 | y | y | 1 | 4 | 5 | 16 |
| M | 1 | 1 | n | y | 4 | 3 | 3 | 16 |
| M | 1 | 3 | n | y | 5 | 3 | 9 | 16 |
| F | 2 | 3 | n | y | 5 | 3 | 0 | 16 |
| M | 2 | 1 | n | y | 2 | 4 | 3 | 16 |
| M | 2 | 2 | n | y | 4 | 3 | 0 | 17 |
| M | 1 | 3 | n | y | 4 | 4 | 0 | 17 |
| F | 1 | 2 | n | y | 5 | 4 | 0 | 17 |
| F | 1 | 2 | n | y | 2 | 3 | 2 | 17 |
| M | 2 | 2 | y | y | 4 | 2 | 13 | 17 |
| F | 1 | 4 | n | y | 5 | 3 | 7 | 17 |
| M | 1 | 3 | n | y | 5 | 4 | 2 | 18 |
| M | 1 | 2 | n | y | 4 | 3 | 2 | 18 |
| F | 1 | 1 | y | y | 4 | 5 | 4 | 18 |
| M | 1 | 2 | y | y | 5 | 4 | 0 | 18 |
| M | 1 | 3 | n | y | 5 | 3 | 2 | 18 |
| M | 1 | 1 | y | y | 3 | 5 | 8 | 18 |
| F | 2 | 1 | n | y | 4 | 2 | 24 | 18 |
| M | 3 | 1 | n | y | 4 | 3 | 6 | 18 |
| F | 1 | 2 | y | y | 3 | 1 | 21 | 18 |
| F | 2 | 4 | y | y | 3 | 1 | 6 | 18 |
| F | 1 | 4 | y | y | 5 | 2 | 0 | 18 |
| M | 1 | 1 | n | y | 5 | 5 | 0 | 18 |
| M | 1 | 2 | y | y | 4 | 2 | 0 | 19 |
| M | 1 | 1 | n | y | 5 | 5 | 6 | 19 |
| M | 1 | 1 | n | y | 3 | 5 | 10 | 19 |
| F | 1 | 3 | y | y | 4 | 3 | 5 | 19 |
| F | 2 | 3 | n | y | 5 | 4 | 0 | 19 |
| M | 1 | 4 | n | y | 4 | 2 | 4 | 20 |
| 4.581443 |
Transcribed Image Text:Variables:
1. Gender - student's gender ('F' - female or 'M' - male)
2. Travel time - home to school travel time (numeric: 1 - <15 min., 2 - 15 to 30 min., 3 - 30 min. to 1 hour,
or 4 - >1 hour)
3. Study time - weekly study time (numeric: 1 - <2 hours, 2 - 2 to 5 hours, 3 - 5 to 10 hours, or 4 - >10
hours)
4. Paid - extra paid classes within the course subject (binary: yes or no)
5. Higher - wants to take higher education (binary: yes or no)
6. Famrel - quality of family relationships (numeric: from 1- very bad to 5 - excellent)
7. Freetime - free time after school (numeric: from 1 - very low to 5 - very high)
8. Absences - number of school absences (numeric: from 0 to 93)
9. Final grade (numeric: from 0 to 20)
10. Y=yes, N=No
Question 1
Given the population variance of the student's final grade is 5. Find 80% confidence interval for the mean
final grade of the students.
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