3 years ago

How many times does 67 go into 12

Mathematics

1 answer:

vladimir1956 [14]3 years ago

3 0

Answer:

.180

Step-by-step explanation:

use a calculater

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Step-by-step explanation:

a. Given that n=40, $\bar x=6.88$ and that: $z_{\alpha/2}=z_{0.05}=1.645$

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$\bar x\pm(margin \ of \ error)\\\\\bar x\pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}\\\\6.88\pm(1.645\times \frac{1.98}{\sqrt{40}})\\\\=[6.3650,7.3950]$

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