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LenaWriter [7]
3 years ago
6

100 yd equals how many in

Mathematics
1 answer:
horrorfan [7]3 years ago
8 0

100 yd * 3ft/1 yd * 12 in /1ft

100*3*12 in

3600 in

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3 years ago
Reading proficiency: An educator wants to construct a 99.5% confidence interval for the proportion of elementary school children
Shkiper50 [21]

Answer:

A sample size of 345 is needed so that the confidence interval will have a margin of error of 0.07

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

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This is n when M = 0.07. So

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\sqrt{n} = \frac{1.2996}{0.07}

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(\sqrt{n})^{2} = (18.5658)^{2}

n = 345

A sample size of 345 is needed so that the confidence interval will have a margin of error of 0.07

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