Comparison of OpenEpi confidence intervals for a sample mean to other
public software programs.
|
Mean, Std Deviation, (sample size) while population size (N=999,999,999) and 95% confidence intervals are held constant |
|||
|
150, 27.36 (n=268) |
10.89, 3.76 (n=20) |
1.56, 8.56 (n=100) |
1.56, 8.56 (n=30) |
95% CI based on z-statistics |
Confidence limits |
Confidence limits |
Confidence limits |
Confidence limits |
OpenEpi |
146.725, 153.275 |
9.34, 12.54* |
-0.1176, 3.2376 |
-1.503, 4.6229 |
EpiInfo6@ (DOS version) |
146.72, 153.28 |
9.34, 12.54* |
-0.12, 3.24 |
-1.5-4.62 |
95% CI based on t-statistics |
|
|
|
|
OpenEpi |
146.709, 153.291 |
9.1362, 12.6438 |
-0.1385, 3.2585 |
-1.6364, 4.7564 |
PEPI$ |
146.709, 153.291 |
9.1303, 12.6497 |
-0.1385, 3.2585 |
-1.6364, 4.7564 |
@ t-statistics is not available
$ z-value is not available.
* Normal approximation method not recommended due to small
sample size.
PEPI: Abramson JH and Gahlinger PM (2001). Computer program for epidemiologists:
PEPI version 4.0. Sagebrush Press,
EpiInfo6
(DOS version). Epidemiology
program office, CDC. (EpiInfo software
downloaded from ‘www.cdc.gov’).