# did i use the right test to compare the effectiveness between two groups? chi squar.

#### hikehub

##### New Member
my study included 825 total cases. Out of which, 377 cases are culture positive to fungus. But only 364 cases are smear positive. So, i compared the effectiveness of these two tests: culture test and smear test.

I then selected chi square fourfold test ,

group 1: culture test & group 2: smear test
effect 1: postive & effect 2: negative

Analyze > Descriptive Statistics > Crosstabs:

result was pearson chi square value was 0.414 and P value : 0.520. So, the P value>0.01. This signifies the effectiveness of two groups are similar.

please check my results in jpg version! Did i used the right Test?

#### puzzlecode

##### New Member
Re: did i use the right test to compare the effectiveness between two groups? chi sq

Hi,

I might not be the best person to answer this cause Im an amateur also but since there is no reply at the moment, I will try to give my opinion.

I think if you want to compare effectiveness, there are some tests: t-test (parametric), anova (parametric), mann-whitney (non-parametric), wilcoxon (non-parametric) and kruskall-walis (non-parametric). Google it to find out the detail of this tests; you will see that before choosing one of this test, first you need to see whether it is parametric or non-parametric.

As far as I know, crosstab chi square check the relationship between variables.

#### hikehub

##### New Member
Re: did i use the right test to compare the effectiveness between two groups? chi sq

Hi,

I might not be the best person to answer this cause Im an amateur also but since there is no reply at the moment, I will try to give my opinion.

I think if you want to compare effectiveness, there are some tests: t-test (parametric), anova (parametric), mann-whitney (non-parametric), wilcoxon (non-parametric) and kruskall-walis (non-parametric). Google it to find out the detail of this tests; you will see that before choosing one of this test, first you need to see whether it is parametric or non-parametric.

As far as I know, crosstab chi square check the relationship between variables.