3 years ago

The ratio of kids to adults at the school play is 7:4. Which statement below describes this relationship?

Mathematics

1 answer:

lubasha [3.4K]3 years ago

5 0

A. would be the correct answer

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The confidence interval is 6.6<μ<6.8.

Step-by-step explanation:

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The limits of the confidence interval can be calculated as

$X \pm z*\frac{\sigma}{\sqrt{n}}\\\\LL=X-z*\frac{\sigma}{\sqrt{n}}=6.7-1.96*\frac{1.5}{\sqrt{601} } =6.7-0.1199=6.6\\\\UL=X+z*\frac{\sigma}{\sqrt{n}}=6.7+1.96*\frac{1.5}{\sqrt{601} } =6.7+0.1199=6.8$

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