Question

m whe t her Given the confidence Label the v 50.3<<63.7 find the theme Fo l c h e check in the mic ASRS of Solid cache 463 with the gendard device s எனை maints Theme the meared check requirements Find the critical value (1 - Formal conclusione incent

Answer 1

1)

We know that the $100(1-\alpha)$ % confidence interval for population mean is given by:

$(\overline{x}- Z_{\alpha/2}\frac{\sigma}{\sqrt{n}},\overline{x}+ Z_{\alpha/2}\frac{\sigma}{\sqrt{n}})$

i.e. $(\overline{x}-E,\overline{x}+ E)$

Acording to the question, $\overline{x}-E=52.3,\overline{x}+ E=63.7$

Solving these equations, we get,

$\overline{x}=58,E=5.7$

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