QMS 102 Lecture Notes - Lecture 4: Cheat Sheet

• School: Ryerson University
• Department: Quantitative Methods
• Course: QMS 102
• Professor: Clare Chua

Document Summary

Quiz 1: 70, 85, 20, 100, 92 suppose those 5 students are the population. Calculate average of sample, must use x-bar x-bar = sigma x/n = (cid:4666)(cid:2875)(cid:2868)+(cid:2876)(cid:2873)+(cid:2870)(cid:2868)+(cid:2869)(cid:2868)(cid:2868)+(cid:2877)(cid:2870)(cid:4667) (cid:2873) The difference: sample is part of the population not the whole, however, if you study those 5 students over the years to see growth that would be your population. Population is essentially other people that could be included in sample but are not. Calculator lesson p. 139: enter a list: 70, 85, 20, 100, 92, f2 calc, f6 set, 1 var list: 1, 1var freq: 1, exit or exe, f1 (1var), x-bar = 73. 4. Important for final, will use and include i n crib sheet. X-bar = (sigma w x)/sigma w [w = weighted: = (cid:4666)(cid:2876)(cid:2868) (cid:2869)(cid:2868)(cid:4667)+(cid:4666)(cid:2875)(cid:2875) (cid:2870)(cid:2868)(cid:4667)+(cid:4666)(cid:2876)(cid:2869) (cid:2871)(cid:2868)(cid:4667)+(cid:4666)(cid:2876)(cid:2871) (cid:2872)(cid:2868)(cid:4667) (cid:2876)(cid:2868)+(cid:2875)(cid:2875)+(cid:2876)(cid:2869)+(cid:2876)(cid:2871) =(cid:884)(cid:885)(cid:884)0: price x list 1, x-bar = (cid:2872)(cid:2868) (cid:2869)(cid:2877)(cid:2868)(cid:2868)+(cid:2872)(cid:2873) (cid:2870)(cid:2872)(cid:2868)(cid:2868)+(cid:2869)(cid:2873) (cid:2871)(cid:2870)(cid:2868)(cid:2868) (cid:2872)(cid:2868)+(cid:2872)(cid:2873)+(cid:2869)(cid:2873) Calculate the overall average production time (cars y, time x)