several sub cluster are
selected randomly. Among them, colleges of economics,
management and accounting, law and politics, have been
selected. In this research at last stage, of sampling in
method of random race some simple, we have benefited
from the random sampling method which is systematic
and simple. Amount of k has been considered about 5 in
order to be simple. For appropriate sampling the entry
door of considerable university has aimed in 5 successive
days between 8 a.m to 6 p.m. similany, at 8 a.m the first
student entered, was selected as a sample. After he/she
the fifth student entered university and tenth student
respectively, in order to select for sampling. If the selected
person didn’t tend to cooperate, or have been questioned
before or he/she wasn’t student, he or she omitted from
sample and the fifth person was selected after he/she since
in the present research statically society is unspecified and
scale of date is qualities for assigning volume of sample
Cochran formula is used: As we see volume of sample is
equaled to 385 people.