ISA 205 Study Guide - Midterm Guide: Standard Deviation, Contingency Table, Squared Deviations From The Mean

• School: Miami University
• Department: Information Systems & Analytics
• Course: ISA 205
• Professor: Schur

Document Summary

Find # classes: group all n data in k # of classes, k is smallest whole # for which (2^k > n) Find class length: largest measurement smallest / number classes (k) round up. Tally and count, graph histogram height is frequency, base is class length. Frequency polygon: plot a point above each class midpoint at height = frequency connect dots. Cumulative distribution: start with smallest, keep adding on until reach 100% Pareto chart: a bar chart having the different kinds of defects listed on the horizontal scale; bar height = frequency, arranged in decreasing height left to right. 4 ways describe quantitative data: center, variability/spread, outliers, shape. Skewed right = right tail is longest; skewed left = left tail is longest. Cross tabulation: row variable, column variable, variable counted in cells (frequency) used to investigate possible relationships. Have to use either row or column percentages to find relationships. Center tendency: mean (population, sample ), median, mode (can have 1+)