STAT2593 Lecture 1: STAT2593 – CH 1
Document Summary
January 6th, 2010 population (n): a large group of people (or object) of a particular interest that we desire to study probability and statistics for engineering and the sciences 7th ed by jay devore old book, buy. Inferential statistics: significant difference: does not escape uncertainty qualitative variable: eye colour, hair colour, letter grade describes a quality quantitative variable: (assuming) defines a quantity) Stem and leaf display don"t skip digits (say if data is 79,98, do not skip 8) leaf does not need to be in order. If none, state "no mode" (if they all appeared twice except one, you would state all except that one) Arrange data in ascending order (or descending, but he prefers if you are consistent) If n is even (two values) take mean of those two. If n is odd, take middle median means 50% of data is higher, and 50|% is lower: measures of variability (range, variance, standard deviation)
