I understand that we go for t test in regression , after the data has been normally disributed using z distribution.
Need to know why cant we use t - test in all the phases , i mean why is it required that t- test requires that the data is normally distributed.....why t-test can't handle this because t-test deals with samples as well right.
I know that they are other non-parametreic tests which dont expect the data to be normally distributed but my question is specific to t test and z-test.
Need to know why cant we use t - test in all the phases , i mean why is it required that t- test requires that the data is normally distributed.....why t-test can't handle this because t-test deals with samples as well right.
I know that they are other non-parametreic tests which dont expect the data to be normally distributed but my question is specific to t test and z-test.