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marishachu [46]

3 years ago

13

It’s being timed tysm xx

2 answers:

liubo4ka [24]3 years ago

8 0

x=-2

have an amazing day <3

Mrac [35]3 years ago

8 0

The answer to the question is x=-2

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Step-by-step explanation:

You add up the two people until u get the number 259

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ABC is congruent to DEF. By which congruence postulate or theorem can this be proven?

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Dilations increase the measure of angles<br> true or false

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I hope this helps! Please comment if you have any questions.

7 0

4 years ago

Merrick walked 3 miles to his friend's house. He left his house at 9AM and arrived at his friend's house at 10.30AM What was his

emmainna [20.7K]

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3 years ago

The percent defective for parts produced by a manufacturing process is targeted at 4%. The process is monitored daily by taking

Anna [14]

Answer:

The 88% confidence interval for the proportion of defectives today is (0.053, 0.123)

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:

$n = 160, \pi = \frac{14}{160} = 0.088$

88% confidence level

So $\alpha = 0.12$ , z is the value of Z that has a pvalue of $1 - \frac{0.12}{2} = 0.94$ , so $Z = 1.555$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.088 - 1.555\sqrt{\frac{0.088*0.912}{160}} = 0.053$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.088 + 1.555\sqrt{\frac{0.088*0.912}{160}} = 0.123$

The 88% confidence interval for the proportion of defectives today is (0.053, 0.123)

6 0

3 years ago