Nursing 3340A/B Lecture Notes - Lecture 9: Twin Study, Frequency Distribution, Analysis Of Variance

• School: Western University
• Department: Nursing
• Course: Nursing 3340A/B
• Professor: Dr.Stephen Lin

Document Summary

Comparing means of two groups chi-square and t-tests. Descriptive and inferential: descriptive statistics (step i, using data to provide descriptions through numbers, calculations, graphs or tables, frequencies, central tendency, measures of dispersion. Inferential statistics (step ii: using data from a sample to make inferences and predictions about a population, types of statistical calculations are methodology dependent. When should we use it: compares the expected frequency with the observed frequency of the data. Chi-square test (x2: data type, categorical (nominal, data (cid:272)a(cid:374) (cid:271)e put i(cid:374) a (cid:862)(cid:272)o(cid:374)ti(cid:374)ge(cid:374)(cid:272)(cid:455) ta(cid:271)le(cid:863) (cid:894)ne(cid:454)t lide(cid:895) frequencies (i. e. counts or percentages) Relationship of interest: goodness of fit (observed vs. expected) - 1 variable, test of independence / association - 2 variables. Number of groups: usuall(cid:455) t(cid:449)o o(cid:396) (cid:373)o(cid:396)e (cid:894)(cid:862)s(cid:373)allish(cid:863) (cid:374)u(cid:373)(cid:271)e(cid:396)(cid:895) You can do them in any order but once you decide the first. 2, the other one is last by default.