A confidence interval for a population mean has length 20. a) Determine the margin of error. b) If the sample mean is 58.1, obtain the confidence interval. Confidence interval: ( ).

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Q: Use the confidence interval to find the margin of error and the sample mean. (0.578,0.740)

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Q: Determine the confidence level for confidence interval shown in the figure below.

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Q: For a sampling distribution of n = 500 and population proportion of 0.48 of those who prefer cookies…

A: n = 500 p = 0.48

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Q: Use the confidence interval to find the margin of error and the sample mean. (0.456,0.620)

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