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

$3.33.

Assume the sample is taken from a normally distributed population. Construct

95%

confidence intervals for (a) the population variance

2

and (b) the population standard deviation

.

Interpret the results.