A population has a standard deviation $\sigma = 19.8$. How large a sample must be drawn so that a $99 \%$ confidence interval for $\mu$ will have a margin of error equal to $4.7 ?$
A) 215
B) 118
C) 7
D) 11

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The Answer of A population has a standard deviation $\sigma = 19.8$. How large a sample must be drawn so that a $99 \%$ confidence interval for $\mu$ will have a margin of error equal to $4.7 ?$
A) 215
B) 118
C) 7
D) 11

A Population Has a Standard Deviation σ=19.8\sigma = 19.8σ=19.8 How Large a Sample Must Be Drawn So That

A Population Has a Standard Deviation $\sigma = 19.8$ How Large a Sample Must Be Drawn So That