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Vlada [557]
3 years ago
8

Do anyone know how to answer this?

Mathematics
1 answer:
ANTONII [103]3 years ago
8 0

Answer:

10

Step-by-step explanation:

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Can anybody help me please
Alexxandr [17]

Step-by-step explanation:

I think you are clear. You can follow me to get more answers. Thanks.

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2 years ago
Suppose that a college student is taking three courses: a two-credit course, a three-credit course, and a four-credit course. Th
Colt1911 [192]

Answer:

3.11

Step-by-step explanation:

[(3.5)(2) + (3)(3+4)] ÷ 9

(7 + 21)/9 = 28/9

3.111111

3.11

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3 years ago
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(Can Someone Help Answer This Problem) + No Links
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Answer:

50 + 100n  

Step-by-step explanation:

The cost is the cost of the visit plus the cost of the cavities

50 + 100n  where n is the number of cavities

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3 years ago
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Luke is decorating trees for an outdoor birthday party. There are 3 trees and Luke needs 4.25 yards of ribbon for each tree.
suter [353]

Answer:

17.85

Step-by-step explanation:

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3 0
3 years ago
g A researcher wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in Atlanta who own a
Helga [31]

Answer:

The sample size needed is 2401.

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}.

The margin of error of the interval is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

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.

Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.

We have to find n, for which M = 0.02.

There is no estimate of p available, so we use \pi = 0.5

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.02}

(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.02})^{2}

n = 2401

The sample size needed is 2401.

7 0
3 years ago
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