Question

express the confidence interval 20.8% ± 8.5% in the form of an inequality.
% < p < %

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Explanation:

Step1: Calculate lower - bound

Subtract the margin of error from the sample proportion. $20.8 - 8.5=12.3$.

Step2: Calculate upper - bound

Add the margin of error to the sample proportion. $20.8 + 8.5 = 29.3$.

Answer:

$12.3\%