Why two samples from the same population could differ

Reference no: EM132461815

Let"s say, you have question being a marketing manager that what is the age difference of customers in two counties of Washington state? Which county has older customers and which county has younger customers for your products? How will you find the answer to these questions and what is the process of getting the answers?

Why two samples from the same population could differ?
Is it necessary that sample sizes be equal to a two-sample test for proportion?
List three cases that you observe in your professional life for comparing two means and explain how they differ. The first one should be of known variance, the second one should be unknown variance but equal and the third one should be unknown variance and unequal variance.

Reference no: EM132461815

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Why two samples from the same population could differ : Let"s say, you have question being a marketing manager that what is the age difference of customers in two counties of Washington state?

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