Page 3 - FINAL CFA SLIDES DECEMBER 2018 DAY 4
P. 3
Session Unit 3:
11. Sampling and Estimation, p250
LOS 11.a: Define simple random sampling (SRS) and a sampling distribution, p. 250
SRS – each item has equal likelihood of selection; Often distinguished from:
Systematic sampling, every nth item is selected! Also often distinguished from:
Stratified random sampling pools sample results drawn from each category in a classification
system. The size of the samples is based on the size of the stratum relative to the population.
LOS 11.b: Explain sampling error.
Sampling error -difference between a sample statistic (the mean, variance, or SD) and its
corresponding (true) population parameter, i.e.= sample mean – population mean = x – µ
LOS 11.c: Distinguish between simple random and stratified random sampling, p251
Can you Now?
