The answer is 280 because if you multiply 400 by .3 you get 120 and if you subtract 120 from 400 you get 280
The sample size suggested by this statement is 664 option second is correct.
<h3>What is the margin of error(MOE)?</h3>
It is defined as an error that provides an estimate of the percentage of errors in real statistical data.
The formula for finding the MOE:
![\rm MOE = Z\times \dfrac{s}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Crm%20MOE%20%3D%20Z%5Ctimes%20%5Cdfrac%7Bs%7D%7B%5Csqrt%7Bn%7D%7D)
Where Z is the z-score at the confidence interval
s is the standard deviation
n is the number of samples.
At 99% confidence Z = 2.576
By using the MOE formula:
0.05 = 2.376×√(0.5(0.5)/n)
After calculating
n = 663.57 ≈ 664
Thus, the sample size suggested by this statement is 664 option second is correct.
Learn more about the Margin of error here:
brainly.com/question/13990500
#SPJ1
255 times 3 which gets you an estimate start point
next you start at 83 then 3 more is 85 then 3 more is 87. those are your numbers
Hey there mate ;),
According to given conditions, your question is :
![\frac{9 + 6}{8 - 2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%20%2B%206%7D%7B8%20-%202%7D%20)
So, now calculating,
![\frac{15}{6}](https://tex.z-dn.net/?f=%20%5Cfrac%7B15%7D%7B6%7D%20)
<em>Now </em><em>lets solve </em><em>by </em><em>reducing </em><em>to </em><em>lowest </em><em>terms,</em>
![→ \frac{15}{6} = \frac{5}{2}](https://tex.z-dn.net/?f=%E2%86%92%20%5Cfrac%7B15%7D%7B6%7D%20%3D%20%5Cfrac%7B5%7D%7B2%7D%20)
<em>Now </em><em>by </em><em>di</em><em>viding,</em><em> </em><em>we </em><em>get,</em>
![→2.5](https://tex.z-dn.net/?f=%E2%86%922.5)
<em>Therefore,</em><em> </em>
![\frac{9 + 6}{8 - 2} = 2.5](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%20%2B%206%7D%7B8%20-%202%7D%20%3D%202.5)