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katrin2010 [14]
3 years ago
12

I need to figure what figure A and B is.

Mathematics
1 answer:
Alexeev081 [22]3 years ago
3 0
I can't see the whole graph
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I took it and got it right

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you want to create a 99 confidence interval with a margin of error of 25 assuming that the population standard deviation is equa
Ahat [919]

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The minimum sample size is 239.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

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Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

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0.25 = 2.575\frac{1.5}{\sqrt{n}}

0.25\sqrt{n} = 2.575*1.5

\sqrt{n} = \frac{2.575*1.5}{0.25}

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4 0
3 years ago
3x^2 + 6 - 2x + 5x - 4x^2 + 9
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Can someone please answer?
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