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aleksklad [387]
3 years ago
13

Here’s an update someone helped me get this and it didn’t work

Mathematics
1 answer:
AfilCa [17]3 years ago
5 0

Answer:

Left side

Ca(OH)2 --> Ca + 2 O + 2 H

2 HBr --> 2 H + 2 Br

Together: Ca + 2 O + 4 H + 2 Br

You have only 1 Br and only 3 H. So you must correct this.


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Answer: (0.771,\ 0.829)

Step-by-step explanation:

Given : Significance level : \alpha: 1-0.99=0.01

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The proportion of tenth graders read above the eighth grade level. =p=\dfrac{1044}{1305}=0.8

The confidence interval for population proportion is given by :-

p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\=0.8\pm(2.576)\sqrt{\dfrac{0.8(1-0.8)}{1305}}\\\\\approx0.8\pm0.029\\\\=(0.771,\ 0.829)

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Step-by-step explanation:

Hope this helps!

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