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3 years ago

13

Sandy's mom is buying fabric for a prom dress. She already has 4 1/4 yards of fabric at home, and she needs a total of 17 3/6 ya

rds of fabric for the dress.
How much more fabric, in yards will sandy's mom need to buy in order to complete the dress?

1 answer:

rosijanka [135]3 years ago

8 0

Sandy will need 13 3/12 more fabric

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Answer:

The correct answer is

(0.0128, 0.0532)

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 interval $1-\alpha$ , we have the following confidence interval of proportions.

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

In which

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For this problem, we have that:

In a random sample of 300 circuits, 10 are defective. This means that $n = 300$ and $\pi = \frac{10}{300} = 0.033$

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The upper limit of this interval is:

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The correct answer is

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2 years ago

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