# How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the?

A researcher wishes to estimate the number of households with two cars. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 2%? A previous study indicates that the proportion of households with two cars is...
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A researcher wishes to estimate the number of households with two cars. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 2%? A previous study indicates that the proportion of households with two cars is 19%.

a) 3150

b) 2552

c) 4

d) 2089

a) 3150

b) 2552

c) 4

d) 2089

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