The final exam scores of 24 randomly selected students in a statistics class are shown in the

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The final exam scores of 24 randomly selected students in a statistics class are shown in the table at the left. Use a 95% level of confidence.


Assume the sample is from a normally distributed population and construct the indicated confidence intervals for 

(a) The population variance σ2 and 

(b) the population standard deviation σ. Interpret the results.

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