A researcher wishes to estimate the number of households with two cars how large a sample is needed in order to be 95% confident that the sample proportion will not differfrom the true proportion by more than 3%
Added by Aitor S.
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The researcher wants to be 95% confident, which corresponds to a Z-score of approximately 1.96 for a two-tailed test. The margin of error (E) is given as 3%, or 0.03. Show more…
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Adi S.
A researcher wishes to estimate the number of households with two cars. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 5%? A previous study indicates that the proportion of households with two cars is 22%.
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