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2 years ago

If George Washington had 12 wooden teeth and 4 natural teeth. What is the ratio of natural teeth to wooden teeth?

Mathematics

2 answers:

Ray Of Light [21]2 years ago

4 0

The ratio would have to be 4:12 or 1:3

kiruha [24]2 years ago

4 0

Answer:

The answer is for sure A. Hope this helped!

Step-by-step explanation:

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3 years ago

A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 3%

andre [41]

Answer: a) 683 b) 1067

Step-by-step explanation:

The confidence interval for population proportion is given by :-

$p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

a) Given : Significance level : $\alpha=1-0.95=0.05$

Critical value : $z_{\alpha/2}}=\pm1.96$

Margin of error : $E=0.03$

Formula to calculate the sample size needed for interval estimate of population proportion :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.2(0.8)(\dfrac{1.96}{0.03})^2=682.951111111\approx683$

Hence, the required sample size would be 683 .

b) If no estimate of the sample proportion is available then the formula to calculate sample size will be :-

$n=0.25(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.96}{0.03})^2=1067.11111111\approx1067$

Hence, the required sample size would be 1067 .

3 0

2 years ago

Please tell me the answer I have been struggling. PS this is middle school math

sammy [17]

Answer:8

Step-by-step explanation

7 0

2 years ago

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