Using the z-distribution, it is found that the 95% confidence interval for the proportion of all seafood sold in the United States that is mislabeled or misidentified is (0.3036, 0.3564).

<h3>z-distribution interval:</h3>

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

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

In which z is the z-score that has a p-value of $\frac{1+\alpha}{2}$ .

For this problem:

1215 samples, hence $n = 1215$ .

33% was mislabeled or misidentified, hence $p = 0.33$ .

95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so $z = 1.96$ .

<h3>The lower limit of this interval is:</h3>

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.33 - 1.96\sqrt{\frac{0.33(0.67)}{1215}} = 0.3036$

<h3>The upper limit of this interval is:</h3>

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.33 + 1.96\sqrt{\frac{0.33(0.67)}{1215}} = 0.3564$

The 95% confidence interval for the proportion of all seafood sold in the United States that is mislabeled or misidentified is (0.3036, 0.3564).

You can learn more about the use of the z-distribution to build a confidence interval at brainly.com/question/25730047

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3 years ago

The temperature is changing every day by negative 7 over 18 degrees Fahrenheit. What will be the change in the temperature after

gayaneshka [121]

You would multiply the -7 by 3 to come up with -21/18.

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3 years ago

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Question 3(Multiple Choice Worth 4 points) (08.05) Jemma wants to solve the following system using the elimination method: y = x

Alex

Answer:

-6.

Step-by-step explanation:

y = x - 6

y = 6x - 19

To eliminate x the first equation should be multiplied by -6 giving:

-6y = -6x + 36

Adding this to the second equation will eliminate x.

3 0

3 years ago

Help 20 points added

Natalija [7]

Answer:

fig 1st 2nd and last

not the third one

8 0

2 years ago

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