A magazine includes a report on the energy costs per year for​ 32-inch liquid crystal display​ (LCD) televisions. The article states that 14 randomly selected​ 32-inch LCD televisions have a sample standard deviation of ​$3.43. Assume the sample is taken from a normally distributed population. Construct 98​% confidence intervals for​ (a) the population variance σ2 and​ (b) the population standard deviation σ. Interpret the results. ​(a) The confidence interval for the population variance is   ​(Round to two decimal places as​ needed.)

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A magazine includes a report on the energy costs per year for​ 32-inch liquid crystal display​ (LCD) televisions. The article states that
14
randomly selected​ 32-inch LCD televisions have a sample standard deviation of
​$3.43.
Assume the sample is taken from a normally distributed population. Construct
98​%
confidence intervals for​ (a) the population variance
σ2
and​ (b) the population standard deviation
σ.
Interpret the results.
​(a) The confidence interval for the population variance is
 
​(Round to two decimal places as​ needed.)
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