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Unformatted text preview: .98 1.00 ounces. We want to determine a 90% confidence interval for the true mean, . 1. What is the sample mean? 2. Explain the meaning of the confidence level. 3. Determine z*. (Show work, including a sketch of the distribution.) 4. Find the margin of error. 5. Determine the 90% confidence interval for the mean weight of the candy bars. Follow the Inference Toolbox. Chapter 103.0 3.0 .50.50...
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 Spring '09
 Mr.Brown
 Statistics, Standard Deviation

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