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a.Find the margin of error E for a 90% confidence interval. (5 points)
Round your answer to the nearest hundredths. .
15 years ago

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MathGuru
Margin of error = (z-value)(sd/√n)

Find the z-value using the z-table for 90% confidence. You will need the standard deviation and the sample size to finish the calculation.

15 years ago

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