Statistical Economics 

 Chi square test

Also known as

 1-test of goodness of fit

2-test of independence

3-test of homogeneity

4-test of population variance

Some important key point frequently 

ask in exams👇

-☑️value value from 0 to 1

-☑️large sample test N>50

☑️applicable on qualitative data

☑️parametric and nonparametric

☑️this is one tailed and two tailed test both

☑️positive skewed

☑️degree of freedom (d.f)=n-k

important formulas

1-mean=d.f

2-variance=2×d.f

3-mode=d.f-2

4-B1[bita]=√2/d.f

this is short note on z test it is important to all competitive exam like economics net KVS PGT economics NVS PGT economics DSSSB PGT economics also for assistant professor economics this is very important topic for who prepare for these exams frequently asked question from this test z test