Dear Sir
I'm a researcher at Cairo
University in the field of computer science.
Due to my PHD I'm
preparing a questionnaire. But the popular is very large.
I classified
it into 35 categories. All I need, is to determine the sample size. is it
proportional to the popular size? How can I determine that sample
size?
Please I need your help.
sahar salah
[EMAIL PROTECTED]
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