QMS 102 Lecture Notes - Lecture 2: Central Tendency, Different Class, The Leaves

• School: Ryerson University
• Department: Quantitative Methods
• Course: QMS 102
• Professor: Douglas Mc Kessock

Document Summary

Variable: a characteristic of an item or individual. Visualization: bar chart, pie chart, pareto chart, side-by-side bar chart. Organization: ordered array, frequency distribution, cumulative percentage distribution. Visualization: stem-and-leaf display, histogram, polygon, ogive, cumulative percentage polygon. Boxplot, and normal probability plot, mean, median, mode, quartiles, geometric mean, range, interquartile range, standard deviation, variance, coefficient of variation, skewness, kurtosis. Two numerical variables: scatter plot, time-series plot. Summary table: a summary table tallies the frequencies or percentages of items in a set of categories so that you can see differences between categories. The bar chart: the bar chart visualizes a categorical variable as a series of bars. The length of each bar represents either the frequency or percentage of values for each category. Each bar is separated by a space called a gap. The pie chart: the pie chart is a circle broken up into slices that represent categories.