Answer
From the given information, for the population with $\mu$ = 60, σ=10, we find:
$\mu$ = $\mu$ _${\bar{x}}$= 60,
$\sigma_{\bar{x}\ }$ = $\frac{σ}{\sqrt n}$ = $\frac{10}{\sqrt 18}$ = 2.3570
b. $\mu$ = $\mu$ _${\bar{x}}$= 60
$\sigma_{\bar{x}\ }$ = $\frac{σ}{\sqrt n}$ = $\frac{10}{\sqrt 90}$ = 1.0541
Work Step by Step
From the given information, for the population with $\mu$ = 60, σ=10, we find:
$\mu$ = $\mu$ _${\bar{x}}$= 60,
$\sigma_{\bar{x}\ }$ = $\frac{σ}{\sqrt n}$ = $\frac{10}{\sqrt 18}$ = 2.3570
b. $\mu$ = $\mu$ _${\bar{x}}$= 60
$\sigma_{\bar{x}\ }$ = $\frac{σ}{\sqrt n}$ = $\frac{10}{\sqrt 90}$ = 1.0541
