We need to use the formula to find Margin of Error but through the sample proportion, that is

We will use a 95% confidence interval, that is a z value of 1.96 (Search in a Normal distribution table)
A) For A our
(proportion) is equal to 0.45. So applying the formula,


B) We make the same of point A, but change our proportion to 0.35


c) We need to calculate the SE through proportion for 0.1, that is

Then our Error is given by,



Answer:
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<span>B) 0.36 and 36%</span>
<span>just divide 9 by 25 to get the answer,</span>
<span>you will get 0.36 when doing this and just convert it into a percent</span>
<span>then boom you get 0.36 and 36 %</span>
<span />
Answer:

Step-by-step explanation:


For this case we must indicate the cosine of A, of the figure shown. By definition:

Substituting the values we have:

So, we have to:

Answer:
Option D