QMS 102 Study Guide - Final Guide: Ogive, Standard Deviation, Interquartile Range

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

Document Summary

10% rule: calculate the difference a=|mean-median|, calculate the 10% of the smaller of the mean and median , say b, if ab, then median is the preferred measure. mean. , and the 10% of the smaller, b=10%*4667=466. 7. Since a>b, we conclude that the median is a better measure! Mode is data entry that occurs the most: arrange data in an ascending data array. Find the rank of the 39th percentile: n=13, k=39. Range : highest number of data set lowest number. So, we can conclude that abc inc. has more variability. We can use a casio calculator to compute the standard deviation: deviation, and for the population standard deviation. for the population standard (2) to find the variance, we need to square the standard deviation. You were asked to fill in a survey by ryerson university about the number of courses you intend to take.