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Alex73 [517]
3 years ago
8

Jdbufbywr6gfuowhfyt5fyijneojnfbygewgihf846584y5864iuhu4gyrf784o3ytgfjnfbjgbr;bjrbvjr

Mathematics
2 answers:
Monica [59]3 years ago
7 0

Answer:

ok:)))

Step-by-step explanation:

Semenov [28]3 years ago
7 0

Answer:

the answer is good question! it's correct.

Step-by-step explanation:

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One hundred rats with mothers that were exposed to high levels of tobacco smoke during pregnancy were put through a simple maze.
Paul [167]

Answer:

The 90% confidence interval for pis (0.7342, 0.8658).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

100 rats mothers, 80 went right. So n = 100, \pi = \frac{80}{100} = 0.8

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 - 1.645\sqrt{\frac{0.8*0.2}{100}} = 0.7342

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 + 1.645\sqrt{\frac{0.8*0.2}{100}} = 0.8658

The 90% confidence interval for pis (0.7342, 0.8658).

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2 years ago
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I believe it is A. Hope this helps!!
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Answer:

4.2

Step-by-step explanation:

Divide 1000 by 236 and you will get that result.

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Were is the rest of the question
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Answer:

12

Step-by-step explanation:

area is base x height. 3×3 is 9. all sides of a square are equal so 3+3+3+3= the perimeter which is 12.

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2 years ago
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