STAT151 Lecture Notes - Lecture 2: Frequency Distribution, Contingency Table, Descriptive Statistics

• School: University of Alberta
• Department: Statistics
• Course: STAT151
• Professor: Omar Rivasplata

Document Summary

We will study the categorical variables using descriptive statistics in this chapter. Bar chart, pareto diagram, and segmented bar chart, To study marks in stat 151 classes, we selected three classes d1, r1 and x1 from all stat 151 classes offered in one academic year in. The following information is obtained for all students in these three classes: What: id, class, marks for midterm, homework, lab assignments, term work (30% midterm, 10% homework and 10% lab. Assignments), final exam, final mark (50% term work and 50% final exam), and letter grades. Who: students in stat 151 classes (d1, r1, and x1) Why: study marks in stat 151 classes. Categorical variables: nominal: classes (d1, r1 and x1, ordinal: letter grades (a, b, c, d and f) o. Quantitative variables: discrete: midterm, final exam, continuous: homework, lab assignments, term work and final mark (if not rounded at the end)