STAT151 Chapter 2: Stats Chapter 2 Lecture Notes Displaying and Describing Categorical Data

• School: University of Alberta
• Department: Statistics
• Course: STAT151
• Professor: Alireza Simchi

Document Summary

Stats chapter 2 lecture notes displaying and describing categorical data. Analyze data from categorical variables using descriptive statistics. Suppose i would like to know that of all students in the u of a, do male students like hockey (cid:373)ore tha(cid:374) fe(cid:373)ale stude(cid:374)ts. I(cid:374) additio(cid:374) i (cid:449)a(cid:374)t to k(cid:374)o(cid:449) if a perso(cid:374)"s i(cid:374)terest i(cid:374) hockey depe(cid:374)ds on the season in which he/she was born. I asked my stat 151 classes to answer the following questions: Students in stats decided to answer questions could be a bias. If people volunteer they likely have feelings toward the study and may have a bias. There are many variables that might affect the results. The variables are called working and confounding variables. We cannot make a casual inference in an observational study. Summarize the data for fan of hockey in a frequency table. Obtain a contingency table for gender and fan of hockey together. Obtain a joint distribution of gender and fan of hockey .