Question: When estimating from a large sample, suppose that one has found the 95% error margin of X to be 10.4. From this information, determine:

When estimating μ from a large sample, suppose that one has found the 95% error margin of X̅ to be 10.4. From this information, determine:

(a) The estimated S.E. of X̅.
(b) The 90% error margin.

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