Obtain the margin of error
The 90% confidence interval is 456.4 to 608.0. Obtain the margin of error by
(a) taking half the length of the confidence interval.
(b) using the formula E =E = Z ? divided by2 times 190 divided by the square root of 17
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The 90% confidence interval is 456.4 to 608.0. Obtain the margin of error by (a) taking half the length of the confidence interval.
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