4 years ago

a cube in emilys closet where she stores her jewlery has a length of 1 1/4 feet. what is the volume of the cubic feet?

Mathematics

1 answer:

evablogger [386]4 years ago

5 0

1 1/4 * 1 1/4 * 1 1/4 = 1.953125

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Step-by-step explanation:

Given : Sample size : $n=815$

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Then , the number of disks which are defective = $815-701=114$

Now, the proportion of disks which are defective : $p=\dfrac{114}{815}\approx0.14$

Significance level : $\alpha: 1-0.9=0.1$

Critical value : $z_{\alpha/2}=1.645$

The confidence interval for population proportion is given by :-

$p\pm\ z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\=0.14\pm(1.645)\sqrt{\dfrac{(0.14)(1-0.14)}{815}}\\\\\approx0.14\pm0.020=(0.14-0.020,0.14+0.020)=(0.120,0.160)$

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