Comparison
of Two Proportions
by Sultan
Z test comparison of two proportions:
To compare two proportions the best software you can
use is MedCalc. It easily
calculates from inputting only four Numbers.First calculate percentage for your data.
Then run Medcalc software.
calculates from inputting only four Numbers.First calculate percentage for your data.
Then run Medcalc software.
From Menu Select:
Test
·
Comparison of two Proportions |
In the box enter data for the 1st set. Data in percentage: Proportions %: _79
Enter the Number of cases (pop) for the 1st set
of Data: Number of cases:_120
Enter the Data for the second using same Method
Enter the Number of cases (pop) for the 2nd set of data: Number of cases:_135
Press the Test button.
It
will look like this
If the result is less than 0.05 then there is
significant difference in the two
proportions. In this case the P value is 0.0195 which is less than 0.05
which mean that there is significant difference in both proportions.The
difference for this proportion is 14.0% and 95% confidence interval for
this difference.
proportions. In this case the P value is 0.0195 which is less than 0.05
which mean that there is significant difference in both proportions.The
difference for this proportion is 14.0% and 95% confidence interval for
this difference.
Download free trail Software from: http://www.medcalc.org