SOCI 328 Lecture Notes - Lecture 13: Interval Ratio
Document Summary
Unit 9- association between two interval ration variables nov 9: spea(cid:396)(cid:373)a(cid:374)"s rho, replaces the actual data values with ranks, e(cid:454)e(cid:272)utes a pea(cid:396)so(cid:374)"s (cid:272)o(cid:396)(cid:396)elatio(cid:374) o(cid:374) the (cid:396)a(cid:374)ked data, measures strength and direction. 1 = perfect negative relationship: 0 = no relationship, 1 = perfect positive relationship, cha(cid:396)a(cid:272)te(cid:396)isti(cid:272)s of spea(cid:396)(cid:373)a(cid:374)"s (cid:396)ho, 1. I(cid:374)te(cid:396)p(cid:396)eted the sa(cid:373)e (cid:449)a(cid:455) as pea(cid:396)so(cid:374)"s (cid:396), i. e. , sig(cid:374) a(cid:374)d (cid:373)ag(cid:374)itude, (cid:271)ou(cid:374)ded (cid:271)(cid:455) 1 and -1, etc: 2. can be used when relationship is curvilinear, 3. more resistant to outliers tha(cid:374) is pea(cid:396)so(cid:374)"s (cid:396, 4. Not (cid:395)uite as po(cid:449)e(cid:396)ful as pea(cid:396)so(cid:374)"s (cid:396) gi(cid:448)e(cid:374) that so(cid:373)e i(cid:374)fo(cid:396)(cid:373)atio(cid:374) is th(cid:396)o(cid:449)(cid:374) a(cid:449)a(cid:455). Whe(cid:374) (cid:396)elatio(cid:374)ship is li(cid:374)ea(cid:396), usuall(cid:455) (cid:271)ette(cid:396) to use pea(cid:396)so(cid:374)"s (cid:396) tha(cid:374) Importance of plotting: each plot comprised of 11 points, same value of r (0. 816, same ols regression line (y = 3 + 0. 5x) Unit 10- association between a categorical variable and interval ratio variable: explore relationship between categorical variable x and interval ratio variable y by comparing, 1.
