Statistical Economics

Z-test

Z-test given by fisher-1913

This is large sample test=n>30

We can avoid degree of freedom

 2- tail test

 less peak (kurtosis)- platykurtic curve

 z test applicable where population correlation coefficient is not zero, than z test is used  

to check to population mean difference

1- if calculated value< table value then H° accept

2-if calculated value >table value then H° reject

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