N คือ จํานวนกลุ่มตัวอย่างf1 คือ จํา

N is the number of samples.F1 is the amount the frequency expressed in customer satisfaction in the most level.F2 is the amount the frequency displayed on the satisfaction scale.F3 is the amount the frequency expressed in moderate levels of satisfaction.F4 is the amount the frequency displayed on the low levels of satisfaction.F5 is the amount the frequency displayed on the satisfaction degree of the smallest.

N is the number of samples
f1 is the number of frequency expressed satisfaction at the highest level
f2 is the number of frequency expressed in the satisfaction level of
f3 is the number of frequency, expressed in customer satisfaction. moderate
f4 is the number of frequencies, expressed satisfaction at a low level
, the number of frequency f5 expressed satisfaction at the minimum.

N is the number of samples F1
is the number of frequencies, expressed satisfaction at the highest level F2
is the number of frequencies, expressed satisfaction at a high level, F3
That is, the number of frequencies, expressed satisfaction at moderate
.F4 is the number of frequencies, expressed satisfaction at the low level F5
is the number of frequencies, expressed in satisfaction at the lowest level
.