Answer
6363.96 dollars
Work Step by Step
$\mu$ =421,00 dollars, σ =90,000 dollars , n = 200
$\mu$ = $\mu$ _${\bar{x}}$= 421,00 dollars
$σ_{\bar{x}\ }$ = $\frac{σ}{\sqrt n}$ = $\frac{90,000}{\sqrt 200}$ = 6363.96 dollars
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