Fresnel Lenses Are

question 20

Multiple Choice

Fresnel lenses are

• A)made of mirror segments.
• B)made of the surface portions of a regular lens.
• C)found in some auto headlamps and theater lights and rear windows of RVs.
• D)all of the above.

---

Definitions:

Confidence Interval

A spectrum of numbers, extracted from sample observations, presumed to hold the value of a not yet identified population characteristic.

Sample Mean

The average value of a set of data points taken from a larger population, used as an estimate of the population mean.

Sample Standard Deviation

A measure of the amount of variation or dispersion of a set of values in a sample.

Mean Salary

The average income earned by employees in a specific group, calculated by dividing the total salary by the number of individuals.