Solve the Problem $n = 25$ $\bar { x } =$

question 72

Multiple Choice

Solve the problem.
-The confidence interval below for the population variance is based on the following sample statistics: $n = 25$ , $\bar { x } =$ $31.1$ , and $s = 4.2$ .
$$9.29 < \sigma ^ { 2 } < 42.82$$ What is the degree of confidence?

• A)95%
• B)99%
• C)90%
• D)98%

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