Chapter 4 · Sampling · Slide 149/274
Correction for a small population: ± 5 %
Calculations show approximate values for a 95% confidence level
4.4 · Sample Size
Correction in Practice
Correction for a small population: ± 5 %
ncorr=n · Nn + N − 1
Computationally required
n = (1 / 0.05)² = 20²
400
… with only N = 100 elements in the population.
→
Corrected
ncorr = (400 · 100) / (400 + 100 − 1)
= 40.000 / 499
= 40.000 / 499
≈ 80
Calculations show approximate values for a 95% confidence level
QUESTIONSTAR · Dr. Paul Marx
149 / 274