lex1kkkk
lex1kkkk
18.03.2021 • 
Mathematics

A marketing manager must decide on the size of the survey sample to be used in order to estimate the proportion of customers who are aware of her brand. She wishes to estimate this proportion to within 9 percentage points with 91% confidence. If the manager guesses that the proportion of aware customers is roughly 29%, what is the size of the sample that must be used

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