Question

A magazine includes a report on the energy costs per year for 32-inch liquid crystal display (LCD) televisions. The articde states that 14 randomly selected 32-inch LCD televisions have a sample standard deviation of $3.88. 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.) Interpret the results. Select the correct choice below and fil in the answer box(es) to complete your choice. Round to two decimal places as needed.) ○ A. With 2% confidence, you can say that the population variance is between O C. With 98% confidence, you can say tat te population variance is between 0 B. With 98% confidence, you can say that the population variance is greater than and 0 D. With 2% confidence, you can say that the population variance is less than and (b) The confidence interval for the population standard deviation is ( Round to two decimal places as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice Round to two decimal places as needed.) A. B With 2% confidence you can say that he populations andard deviation is between and dolars per year. with 2% confidence, you can say that the population standard deviation is greater than dollars per year. With 98 con ence, ucansa at he ople standard de ation sess a dollars year. and dolars per year O c O D With 98% confidence, you can saythat the population standard deviation is between

Answer 1