Suppose that a business researcher is attempting to estimate the amount that members of a target segment spend annually on detergent and wants to use a Z-value of 1.96. If past research studies with this target market segment have shown that the standard deviation for this type of study was approximately $3.12, approximately what sample size should the researcher use?
d) None of the above
A critical component of sample size formulas is the estimation of variance in the primary variables of interest in the study. we should use Var=Square(Standard deviation ) = (3.12)^2= 9.73 in this question.
<br>However, some other important variables are ...