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 $3.94. Assume the sample is taken from a normally distributed population. Construct 80% confidence intervals for (a) the population variance sigmasquared and (b) the population standard deviation sigma. Interpret the results.

step-by-step explanation:

the shape,the size and the distance

"a" determine whether sage found the correct quotient. show your work

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have