Fortunately,when Testing for Differences,you Will Not Need to Be Concerned

Multiple Choice

Fortunately,when testing for differences,you will not need to be concerned whether to use the t or z test because:

A) the z is easier to calculate and to interpret and should always be used.
B) the t is more widely known among statisticians and should always be used.
C) assumptions of the z and t are minimal and are of concern only to statisticians.
D) SPSS,and most statistical software packages,are programmed to use the correct statistic.
E) clients will not know the difference.