QMS 102 Study Guide - Final Guide: Cumulative Frequency Analysis, Interquartile Range, Frequency Distribution

• School: Ryerson University
• Department: Quantitative Methods
• Course: QMS 102
• Professor: Nursel Ruzgar

Document Summary

Population: group of all items of interest to the statistics practitioner. Mean number of soft drinks sold at ryerson every week. Sample: a set of items drawn from the population. Average number of soft drinks these students buy per week. Variable: a characteristic of population or sample that is of interest for us. Number of soft drinks a student buys every week. Descriptive statistics: involves the arrangement, summary, and presentation of data, to enable meaningful interpretation, and to support decision making. Inferential statistics: a set of methods used to draw conclusions about characteristics of a population based on sample data. Catego(cid:396)i(cid:272)al (cid:894)(cid:395)ualitati(cid:448)e(cid:895) (cid:448)a(cid:396)ia(cid:271)les ha(cid:448)e (cid:448)alues that (cid:272)a(cid:374) o(cid:374)l(cid:455) (cid:271)e pla(cid:272)ed i(cid:374)to (cid:272)atego(cid:396)ies, su(cid:272)h as (cid:862)(cid:455)es(cid:863) a(cid:374)d (cid:862)(cid:374)o. (cid:863) Numerical (quantitative) variables have values that represent quantities. Arithmetic operations (cid:272)a(cid:374) (cid:271)e pe(cid:396)fo(cid:396)(cid:373)ed o(cid:374) i(cid:374)te(cid:396)(cid:448)al data, so it"s (cid:373)ea(cid:374)i(cid:374)gful to talk a(cid:271)out (cid:1006)*weight, o(cid:396) p(cid:396)i(cid:272)e + . (cid:1009), a(cid:374)d so o(cid:374)