STATS 10 Lecture Notes - Lecture 3: Unimodality, Sport Utility Vehicle, Bar Chart
Document Summary
Refer to describing the data collected: through words, pictures, numeric summaries. Display: with bar chart, etc: y-axis = frequency; x-axis = make, arrangement (order) of the bars do not matter in categorical data. Are the observed values similar to each other or quite different from each another: similar = low variation, different = high(er) variation. Summarize two categorical variables with a two-way table. Frequency table with categories on both axes. What % of honda vehicles are suvs: 6/23. What % of the vehicles are hondas and sedans: 15/180. Includes x1 and goes up to x2 (not including x2: arrangement of bar is tied to the number line. If bins include more numbers, graph = less detail: stem plot, stem | leaf. 3 if have more data, can split stem more. 4 rotating stem plot to the left looks like a histogram.
