Use the Given Degree of Confidence and Sample Data to Find

question 55

Multiple Choice

Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation ?.
Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation.
-Weights of men: $90 \%$ confidence; $\mathrm { n } = 14 , \overline { \mathrm { x } } = 154.8 \mathrm { lb } , \mathrm { s } = 11.1 \mathrm { lb }$

• A) \(8.7 \mathrm { lb } < \sigma < 14.3 \mathrm { lb }\)
• B) \(8.2 \mathrm { lb } < \sigma < 15.6 \mathrm { lb }\)
• C) \(9.0 \mathrm { lb } < \sigma < 2.7 \mathrm { lb }\)
• D) \(8.5 \mathrm { lb } < \sigma < 16.5 \mathrm { lb }\)

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