simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2. 2 square root of 8 8 square root
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The confidence interval can be calculated from the margin of error, and vice versa,
The margin of error of the confidence interval is 2.156
The confidence interval is given as:
The formula of confidence interval is:
Where E represents the margin of error.
So, by comparison:
Multiply
Hence, the margin of error of the confidence interval is 2.156
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