SOCI 311 Lecture Notes - Lecture 6: Statistical Parameter, Statistic, Standard Deviation

• School: University of Calgary
• Department: Sociology
• Course: SOCI 311
• Professor: Alex Bierman

Document Summary

If you took a sample from population and calculated the mean or proportio(cid:374), you"ll (cid:271)e (cid:449)ro(cid:374)g. Sociology uses representative sample, sociologist wants to be sure that the sample is representative to the population because they want it to be proportioned. Do(cid:374)"t (cid:449)a(cid:374)t self- sele(cid:272)tio(cid:374) i(cid:374) the study (cid:271)e(cid:272)ause you (cid:272)a(cid:374)"t (cid:271)e assured that your sample equals to your population. Randoms: no self-selection instead everyone in the population is chosen due to equal opportunity of selection called simple random selection srs (no bias in the study) can infer/generalize to a population value. Bias does not match up population (skewness in sample) What we want do is infer to the population by taking our sample statistic and estimate the population parameter. Even if you have sample representative, your sample statistic will be wrong/ not accurate (will not reproduce population parameter) because sampling verifiability. Example: 30, 20, 15 how does it take you to get to school, mean=21. 5.