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balandron [24]
3 years ago
6

The answer to number 6 ASAP

Mathematics
1 answer:
ra1l [238]3 years ago
8 0

Answer:

<h2>A'(-1, -4)</h2>

Step-by-step explanation:

A(x, y)

reflected across the x-axis: A'(x, -y)

reflected across the y-axis: A''(-x, y)

We have A(1, 4)

reflected across the x-axis: (1, -4)

and then reflected across the y-axis: A'(-1, -4)

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Answer:

\hat p = \frac{14}{105}= 0.133

And that represent the proportion of failures.

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Step-by-step explanation:

Previous concept

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In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

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The proportion estimated would be:

\hat p = \frac{14}{105}= 0.133

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0.133 - 2.58\sqrt{\frac{0.133(1-0.133)}{105}}=0.0475

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The 99% confidence interval would be given by (0.0475;0.2185)

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