STATISTICAL TECHNIQUES AND TOOLS
SAMPLING DISTRIBUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A 90% confidence interval for the mean speed driven by cars on East Main St. is given by (21, 45). What was the margin of error of this study?
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12
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24
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33
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None of these.
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Explanation:
Detailed explanation-1: -A 90% confidence interval has a z-score (a critical value) of 1.645. In conclusion, the margin of error is 2.52%.
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