SOLUTION: The standard deviation of a population is 1.9. What is the margin of error? The standard deviation for a set of data is 9.5. The mean is 205. What is the margin of error?

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Question 1121731: The standard deviation of a population is 1.9.
What is the margin of error?
The standard deviation for a set of data is 9.5. The mean is 205.
What is the margin of error?
Answer by Boreal(15235) About Me  (Show Source):
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The margin of error needs to be defined, but if one uses 1.96 sd (95% by empiric rule for normal distributions), it is 3.72. For 2 s.d, it is 3.61
The margin of error would be 19 for 2 s.d. or 18.6 for 1.96 s.d The margin of error is +/-19, for example, the interval within the margin of error would be (186, 224).