3 years ago

Thank you if you help

1 answer:

7 0

So the second question asks about the perimeter of a rectangular pool and the answer for that is W=87m.

I don’t know about the first question sorry but I’ll try figuring it out.

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2/3x = 1.2

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Answer: $(3.0,\ 3.2)$

Step-by-step explanation:

Confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$ (1)

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$\sigma$ = Population standard deviation.

n= Sample size.

As per given , we have

n= 610

$\sigma=1.1$

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Significance level for 85% confidence : $\alpha=1-0.85=0.15$

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