The Confidence Interval $15.94 < \sigma ^ { 2 } < 73.44$

question 86

Multiple Choice

The confidence interval, $15.94 < \sigma ^ { 2 } < 73.44$ , for the population variance is based on the following sample statistics: $\mathrm { n } = 25 , \overline { \mathrm { x } } = 31.0$ and $\mathrm { s } = 5.5$ . What is the degree of confidence?

• A) 90%
• B) 98%
• C) 99%
• D) 95%

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