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3 years ago

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Mathematics

1 answer:

saul85 [17]3 years ago

8 0

Answer:

The ans from the bottom left

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Finish the phrase "Lack of planning on your part doesn't require..." (use all lowercase letter and put spaces between each word)

vazorg [7]

Answer:

"Lack of planning on your part doesn't require an emergency on my part."

Step-by-step explanation:

Doesnt it say it in the photo?

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3 years ago

If you get 15 dollars weekly how much would it take you to get 175?

Helga [31]

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3 years ago

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Solve using proportions please

OLEGan [10]

<h3>Answer:</h3>

30.2833 L

<h3>Step-by-step explanation:</h3>

(x L)/(8 gal) = (3.785411784 L)/(1 gal) . . . . exact conversion

Multiply by 8 gal.

... x L = (8 gal) × (3.785411784 L)/(1 gal) = 30.283294272 L

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3 years ago

What is now the length in meters?

Natasha_Volkova [10]

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3 years ago

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Suppose that a market research firm is hired to estimate the percent of adults living in a large city who have cell phones. 500

Alborosie

Answer:

The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).

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:

$n = 500, \pi = \frac{421}{500} = 0.842$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.842 - 1.96\sqrt{\frac{0.842*0.158}{500}} = 0.81$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.842 + 1.96\sqrt{\frac{0.842*0.158}{500}} = 0.874$

The 95% confidence interval estimate for the true proportion of adults residents of this city who have cell phones is (0.81, 0.874).

6 0

3 years ago